Dory and Marlin went on an incredible journey across the ocean to find his son, Nemo. A year passed, and after their grand adventure, Dory decided to stay with Marlin and Nemo — and join the community of the beautiful Great Barrier Reef. Dory had a cozy coral cave where she slept each night, and Marlin and Nemo lived in a comfy anemone only a few strokes away. Dory was able to remember more when they were together — in fact, everything seemed better now that they had each other. She, Marlin, and Nemo were very close, and they always tried to keep each other happy and safe.

One night, Dory swam out of her cave. Through the gentle swaying fronds of the sea anemone she could see Marlin and Nemo sleeping.

"Hey, Marlin," she whispered. She swam toward them and accidentally hit the anemone. It jolted her with an shock! "Ow-ow-ow-ow!" she cried.

Marlin awoke groggily and gently pushed her back into her cave. "Oh, Dory, it's not time to get up yet. You have to go back to bed."

"And remember, the anemone stings," Nemo said, still half asleep.

"Oh, right. Yeah. Sorry. Back to bed, back to bed," Dory said, settling back down. But she quickly headed out again, hitting the anemone's stinging cells again. "Ow!"

Now Marlin jumped up. "Go back to bed — that's it. Very simple. Bed. Back to it," he said curtly, pointing a fin toward her home.

"Ah. Um ... hmm. Got it," said Dory, once again swimming back to her cave. But then she turned around. "Hey, Marlin —"

"And we're up," said Marlin, realizing that he wouldn't be able to get back to sleep. "That's it. Ready to start the day."

Dory, Marlin, and Nemo followed the winding path that led to Nemo's school. As they often did, they reminisced about their great adventure across the ocean to find Nemo.

"Okay," said Marlin. "So, there we were, stuck inside a whale, hanging from his tongue —"

"And we were looking for something," said Dory.

"Nemo," said Marlin.

"Hmm. Found him!" said Dory happily.

Nemo giggled.

"I remember it like it was yesterday. Although I don't really remember yesterday all that well," Dory admitted.

"That must have been the scariest part of the whole trip. Right, Dad?" Nemo asked.

"No, the scariest part of the whole trip were the four sharks."

Nemo looked at his father. "Wait, I thought there were three sharks."

"No," said Marlin. "No, there were definitely four."

"But last time you told it, there were three."

"Son, which one of us traveled across the entire ocean?"

"Nemo did," Dory said quickly. "Obviously, we had to cross the ocean to find him, so, you know ... he went first."

Marlin stared at Dory, realizing she was right. Nemo grinned proudly at his father. "I guess that's true, isn't it?" said Marlin, smiling.

When they got to Sandy Patch School, the teacher, Mr. Ray, was pacing nervously. As Marlin, Dory, and Nemo rounded the corner, Mr. Ray swam toward them. "Weeeeell, you made it! You almost missed the field trip," the stingray said.

"A field trip? Ooh, I love field trips. Where are we going?" Dory asked excitedly. Mr. Ray gave Marlin a look. "I thought you told her," he whispered to Marlin.

"I did tell her," said Marlin. Then he turned to Dory. It was clear that he was going to have to explain the situation ... again. "Uh, Dory ..." he said, trying to get her attention. Dory listened with a smile on her face. "Mr. Ray has too many fish to keep an eye on today." Mr. Ray swam off toward the class as Marlin continued. "So it would be best if — today — you weren't, exactly ..." Marlin's voice trailed off as he tried to figure out how to say what he needed to say without hurting Dory's feelings. "... with the class."

"Oh. Why not?" asked Dory.

"Well ... you know how you have problems remembering things sometimes?" Marlin asked.

"That's the one thing I can remember, yes," Dory said with a chuckle.

"Okay, and sometimes — and it's not your fault — but it can cause you to wander," said Marlin.

"Mmm-hmm."

"So he doesn't have enough help. To keep an eye on ... on ... on those who are not —"

"Sure."

"— part of the group."

"Okay."

"He's ... he's a teacher, not a scout!" Marlin said, laughing nervously.

"Poor guy. You know, he is so overworked," said Dory.

Marlin wasn't sure that Dory was getting the full picture. "You understand?" Marlin asked.

"I totally understand now," she replied.

"Okay?"

"Um-hmm," said Dory.

"Good," Marlin said, satisfied.

"He wants me to be the teacher's assistant," Dory said proudly.

Marlin couldn't believe it! How could Dory get it so wrong? "Uh ... no, not exactly —"

"Well, I am so honored. I have never been a teaching assistant before," said Dory happily.

Marlin sighed, giving up. "Mr. Ray!" he called. "You've got help. Good luck!" Exasperated, Marlin swam back toward home.

"Ooohhkey-dokey," said Mr. Ray.

Once the class settled, Mr. Ray began his lesson. Dory tried to help in her own way ... by repeating everything he said.

"All right, kids!" said Mr. Ray.

"All right, kids!" said Dory.

"Today's the day!" said Mr. Ray.

"Today's the day!" repeated Dory.

"Our field trip to the stingray migration!"

"Stingray migration!"

"Now, does anyone know why we migrate?" asked Mr. Ray.

No one responded. Mr. Ray was met with blank stares and a deafening silence.

"Come on," said Dory, smacking her fins together. "You gotta know this stuff."

"Migration is about going back to ...," Mr. Ray offered, trying to give the class a hint.

"Bed!" said Chickenfish.

"Yes!" said Dory.

"No," said Mr. Ray.

"No!" echoed Dory.

"The sand!" answered Pearl, raising a fin.

"No," repeated Mr. Ray. "Migration is about going home."

"Home," Dory repeated slowly. The word seemed to tug on something deep inside her.

"Which is where you're from," said Mr. Ray.

"Where you're from ...," said Dory thoughtfully.

"Can someone tell me where you're from?" asked Mr. Ray.

"I live by a giant rock!" yelled one student.

"My house is covered in algae!" yelled Chickenfish.

"Where'd you grow up, Dory?" asked a young crab.

"Me?" Dory asked, pointing her fin at her chest. "Um, I don't know ...," she said, her big eyes shifting downward. The kids immediately quieted; they were surprised by Dory's answer. "My family?" she continued. "Uh, where are they?" Dory turned and stared out at the open water, lost in thought. Something in that conversation had jogged her foggy memory. But she could never hold on to those thoughts for very long. When the water ceased to hold her attention, she turned to see Nemo's entire class staring at her.

"Can I help you?" she asked. They giggled. "I'm sorry." Dory was embarrassed. "Did I forget again? You see, I suffer from —"

The class chimed in together, "Short-term memory loss."

"What's it like having short-term memory loss?" asked Chickenfish.

"Good question," Dory answered. She thought for a moment, then tried to explain. "Well, like, for instance, if I'm thinking about ... say, kelp, and then all of a sudden — What? And even though I just had the kelp in my head ... I ... See, I ... I don't even know what I said just now, to tell you the example. Let's just say it's kelp."

The class stared at Dory, bewildered, as she continued. She was forgetting right before their very eyes. "You say something about kelp and I'm like, what about kelp? But you're saying, ‘You brought it up.' I'm like ... okay, that's gone now, too. I don't even know what we were just saying. See, that's my problem ... in a nutshell."

"Aw, that's so sad," said one young fish.

Dory smiled. "I try not to dwell on it," she said genuinely.

Mr. Ray jumped in, eager to move on. "Okay, kids, enough discussion. Climb aboard, explorers! I feel a migration song coming on!" He held a note as he sang, "Ooooooooooohhhhhhhhhhhhhhhhhhh —"

He continued to sing a migration song as he carried the class on his back. Dory sang along, swimming next to Mr. Ray. When they reached the edge of the reef, the students jumped off and he reminded them to stay away from the edge.

The class settled down and waited expectantly. "Now I need everyone to listen to me," started Mr. Ray.

"All right, listen up!" said Dory, continuing to repeat Mr. Ray's words.

"When the rays pass through here — what do we have to be careful of?" asked Mr. Ray.

"Everybody has to be careful of what? Hmm?" echoed Dory.

"The undertow!" the students answered.

"That's right!" said Mr. Ray.

"That's right, the under —" Dory said, stopping suddenly. "The undertow?" she said to herself. "I've heard that before." Dory was so focused on the word that even as Mr. Ray continued, his voice began to fade. Soon she didn't hear him at all.

"Mr. Ray!" squealed Nemo, raising his fin. "So how do the stingrays all know where to go?" he asked.

"That's what instinct is, Nemo," answered Mr. Ray. "Something deep inside you that feels so familiar that you have to listen to it — like a song you've always known." Mr. Ray perked up and held a fin to his ear. "And I can hear mine now!"

In the distance, they heard the sound of a many voices, singing as one. It was like a choir singing a beautiful song. As the stingrays swam closer, the choir became louder and louder. Everyone watched, amazed. The massive school of rays gracefully swam and sang in perfect harmony. It was an awesome sight!

The sea grass bent, pulled by the strength of the massive current created by the flapping of the rays' fins. But Dory just stared at the swaying grass. The way it moved reminded her of something. She slowly approached it, as if in a trance. Then inside her mind, she heard a pair of faraway, frightened voices saying "Watch out, kelpcake!" and "You have to stay away from the undertow!"

"The undertow," Dory said again, repeating that strangely familiar word. She drifted closer and closer to the rays and, all of a sudden, she was pulled into the undertow! She screamed as her body twirled and twisted — the whirling water was completely overtaking her!

"DORY!" shouted Nemo. She continued to scream as she moved farther and farther away from Nemo and the rest of the class.

FLASH! Suddenly a lightning fast clip of a memory played through her mind. She remembered being pulled away from her parents as they called her name. She heard their voices clearly shouting again and again. Then everything went black.

经过一番不可思议的旅程，多莉和马林穿越大洋，终于找到了他的儿子——尼莫。一年过去了，在经历了那次大冒险之后，多莉决定跟马林和尼莫一起生活——加入到大堡礁这个美丽的大家庭里。多莉有了间舒适的珊瑚洞穴，她每晚都睡在那里；马林和尼莫则住在一只环境舒适的海葵身上，离她仅有几步之遥。他们待在一起的时候，多莉也能记得更多了——实际上，由于他们拥有彼此，一切似乎都变得更加美好。她、马林和尼莫亲密无间，他们总是想方设法地让彼此开心并确保彼此的安全。

一天晚上，多莉游出了自己的洞穴。透过海葵身上那轻柔摇摆的触手，她看到马林和尼莫正在睡觉。

“嗨，马林，”她轻声喊道。她游向他们，不觉之间撞上了海葵。它朝她猛地一记狠击！“哎哟——哎哟——哎哟——哎哟！”她大叫道。

马林昏昏沉沉地醒来，轻轻地将她推回到洞穴。“唉，多莉，还没到起床的时候。你回去睡吧。”

“要记住，海葵可是会蜇刺的，”尼莫半睡半醒中说道。

“哦，对的。是的。对不起。回去睡，回去睡，”多莉一边说一边退了回去。可她很快又游了出来，再次撞上了海葵的蜇刺细胞。“哎哟！”

这时马林跳了出来。“回到床上去——就这样。非常简单，床上。回屋里去。”他敷衍道，用鱼鳍指着她的屋子。

“啊。呃……嗯。好的。”多莉说着，再次游回了她的洞穴。可是紧接着她又转过身来，说道：“嗨，马林——”

“我们起床了，”马林说着，意识到没法再继续睡觉，“好啦。开启今天的生活吧。”

多莉、马林和尼莫顺着蜿蜒的道路来到了尼莫的学校。像往常一样，他们一路追忆了跨越大洋寻找尼莫的冒险壮举。

“好的，”马林说道，“于是，我们就这样，困在了鲸鱼嘴里，悬挂在了他的舌头上——”

“我们当时正在找某个东西。”多莉说。

“是尼莫。”马林说。

“嗯。找到他了！”多莉愉快地说道。

尼莫咯咯直笑。

“我记得很清楚，仿佛是昨天发生的事。虽然昨天的事我倒真没能记得那么清楚。”多莉坦白道。

“那肯定是整个旅程中最可怕的部分。对吗，爸爸？”尼莫问。

“不对，最可怕的部分是那四条鲨鱼。”

尼莫望着他的父亲，说道：“等等，我记得是三条鲨鱼。”

“不对，”马林说，“不对，肯定是四条。”

“可是你上次讲的还是三条。”

“儿子，咱们当中是谁穿越了整个大洋？”

“是尼莫，”多莉快语道，“显而易见，我们得越过整个大洋去找他，所以，你瞧……是他先穿越的。”

马林瞪着多莉，发现她说得没错。尼莫骄傲地冲着父亲咧嘴一笑。“我觉得这话没错，不是吗？”马林微笑道。

他们抵达沙地小区学校的时候，学校的雷老师正在紧张地踱着步子。一看到马林、多莉和尼莫出现在拐角，雷老师就朝着他们游了过去。“好啦，你们终于到了！差点儿就要错过实地考察了。”这条魔鬼鱼说道。

“实地考察？哦，我喜欢实地考察。我们要去哪里？”多莉兴奋地问道。雷老师朝马林望了一眼。“我还以为你告诉她了。”他对马林悄声说道。

“我的确告诉她了。”马林说。然后他转向多莉。显然，他必须得……再次……解释一下当前状况。“呃，多莉……”他说道，想引起她的注意。多莉面带微笑地听着。“今天雷老师要照看的鱼儿很多。”雷老师朝着班里的学生游了过去，马林接着说道。“所以呢——今天——你最好不要，就是……”马林拖长声音，努力思索着该怎样说才能言辞达意又不伤害多莉的感情，“……跟着班上学生。”

“哦，为什么不呢？”多莉问。

“嗯……你知道自己有时记事不太牢吧？”马林问。

“我记得自己健忘，是的。”多莉咯咯笑道。

“好的，有时候——这也不是你的错——不过这会弄得你四处乱逛。”马林说。

“唔——嗯。”

“所以他没有太多精力。去照看……照看……那些不是——”

“确实。”

“——班里的成员。”

“是的。”

“他是……他是老师，不是守卫！”马林紧张地笑道。

“可怜的人。要知道，他太操劳过度了，”多莉说。

马林不清楚多莉有没有听懂他的意思。“你明白了吗？”马林问。

“现在我完全明白了。”她回答。

“真的？”

“嗯——嗯。”多莉说。

“很好。”马林满意地说道。

“他想让我做助教。”多莉骄傲地说。

马林简直不敢相信！多莉怎么会误解成这样？“呃……不，不完全是——”

“好的，我十分荣幸。我以前从没当过助教。”多莉愉快地说。

马林叹了口气，只好放弃。“雷老师！”他喊道。“你有帮手了。祝您好运！”马林悻悻地朝家游去。

“好的。”雷老师说。

等到班里安静下来，雷老师便开始上课。多莉以自己的方式，尽力协助……重复着他说的每一句话。

“好的，孩子们！”雷老师说。

“好的，孩子们！”多莉说。

“我们今天！”雷老师说

“我们今天！”多莉重复道。

“要去实地考察魔鬼鱼迁徙！”

“魔鬼鱼迁徙！”

“那么，有谁知道我们为什么要迁徙吗？”雷老师问道。

无人应答。雷老师看见大家茫然地瞪着眼睛，一片沉寂。

“都来说说吧，”多莉拍着双鳍，说道，“你们肯定知道的。”

“迁徙就是关于回到……”雷老师提点着，想给同学们一点提示。

“床上！”鸡鱼说。

“对的！”多莉说。

“不对。”雷老师说。

“不对！”多莉应和道。

“沙地！”章鱼珍珠举着鳍答道。

“不对，”雷老师再次说道，“迁徙是回家。”

“家。” 多莉缓缓重复道。 这个字似乎勾起了她内心深处的某样东西。

“也就是你们来自哪里。”雷老师说。

“你们来自哪里……”多莉若有所思地说道。

“有谁能告诉我你们都来自哪里吗？”雷老师问。

“我住在大岩石旁！”一位学生嚷道。

“我家房子布满了海藻！”鸡鱼嚷道。

“你是在哪里长大的呢，多莉？”一只小螃蟹问道。

“我吗？”多莉一边问，一边用鳍指向自己胸口。“呃，我不知道……”她一双大眼转向了下方说道。孩子们立刻安静了下来；听到多莉的回答，他们都很惊讶。“我的家人？”她继续说道。“呃，他们在哪里呢？”多莉转身，出神地望着那片公共水域。刚才的对话里有某样东西唤醒了她模糊的记忆。然而，她的思索从来都不会持续太久。她从海水那里回过神来，转身看到尼莫班上的同学全都在盯着她看。

“需要我帮忙吗？”她问。大家哄堂大笑。“对不起。”多莉感到尴尬。“我是不是又忘了什么？你们知道，我有——”

全班集体唱和道：“短时记忆丧失症。”

“短时记忆丧失症到底是怎么回事儿？”鸡鱼问。

“问得好。”多莉答道。她想了一会儿，然后费力地解释道：“嗯，像是，举个例子，我正在想着……比如说，海带，然后突然之间——什么？尽管我脑子里刚刚还在想着海带……我……瞧，我……我现在都不知道自己刚才说什么了，跟你们举个例子吧。就拿海带举例。”

全班同学盯着多莉，满脸困惑地看着她自说自话。而她就在他们的眼皮子底下失忆了。“你们说海带什么的，而我就像，海带怎么了？但是你们说，‘是你提出来的啊，’我就像……好吧，把那个也忘了。我甚至都不知道我们刚才说了什么。明白了吧，这就是我的病症……简而言之。”

“哦，那可真糟。”一条小鱼说道。

多莉微微一笑。“我尽量不去深究这事。”她坦诚地说。

想要快点出发的雷老师打断了对话：“好了，孩子们，讨论结束。都上船吧，探险家们！我觉得迁徙之歌得唱响起来了！”他起了个调，唱了起来，“啊啊啊——”

他背上驮着全班学生，继续唱着迁徙之歌。多莉在雷老师身旁边游着，也跟着唱了起来。他们一抵达大堡礁边缘，学生们就跳了下来，雷老师则提醒他们不要靠近大堡礁边缘。

学生们全都安静下来，满怀期望地等待上课。“好，大家都听我说。”雷老师开口说道。

“好的，都注意听！”多莉说，继续重复着雷老师的话。

“魔鬼鱼从这里经过的时候——我们应该小心什么？”雷老师问。

“大家要小心什么呢？嗯？”多莉应和道。

“暗流！”学生们回答道。

“说得没错！”雷老师说。

“说得没错，暗——”多莉说着，突然停了下来。“暗流？”她自言自语道。“这个我以前听到过。”虽然雷老师还在继续说，可多莉却一门心思琢磨起了那个词，他的声音渐渐黯淡了下去。很快她就完全听不见他在说什么了。

“雷老师！”尼莫举起鱼鳍高声喊道。“那魔鬼鱼怎样知道该往哪里去呢？”他问。

“那就是本能了，尼莫，”雷老师回答，“是内心深处某种熟悉的召唤，你必须得去听从——就像是你早就熟知的一首歌。”雷老师直起身子，将鳍放在耳旁，继续说道：“现在我就听到了我的歌。”

他们听到远处传来了众多声音的齐声合唱。那就像合唱团在唱着优美的歌谣。魔鬼鱼们越游越近，合唱团的声音也越来越响。大家都注视着，惊叹不已。这一大群魔鬼鱼吟唱游弋着，姿态优雅，和音完美。这景象真壮观！

魔鬼鱼摇摆着双鳍，游过之处卷起巨大水流，海草也随之低头弯腰。可是多莉却只盯着摇摆的海草。它那舞动的样子令她想起了什么。她缓缓地朝它游去，一副神思恍惚的样子。就在这时，在她脑海深处，她听到了两个久远而又惊恐的声音，一个声音说，“当心，小宝贝！”另一个声音说，“你得离暗流远点儿！”

“暗流，”多莉又重复说着这个陌生而熟悉的字眼。她随流飘动，离魔鬼鱼群越来越近；突然，她被卷入了暗流之中！她惊声尖叫，感觉身体正在高速旋转扭曲——急速回旋的水流将她完全卷了进去！

“多莉！”尼莫喊道。她不断尖叫着，离尼莫和班上的同学越来越远。

刹那间！一个记忆片段突然闪入她的脑海之中。她想起当时被卷离父母身边之时，他们也在呼唤着她的名字。她清楚地听到他们一声又一声的呼唤。然后，眼前一片漆黑。