When Coral, a whole neighborhood, and hundred of eggs disappear, the only ones left from the attack are Marlin and Nemo. Things get difficult when Marlin promises that nothing (bad) will happen to Nemo and protects from everything. They get into an argument one day and Nemo later gets captured. Marlin tries to save him and bumps into Dory, a goofy fish with short term memory loss. Because of this Marlin doesn't trust her, but he learns to trust her which helps him learn to trust Nemo. The three gain popularity with the whole ocean, and many help Marlin and Nemo to find each other.