When his son, Nemo is taken from him by a diver, Marlin the clown fish sets off on a journey to rescue him. Together with Dory, a blue tang fish with short term memory loss, they set off through the oceans, whilst joining a club with sharks, dodging jellyfish, and hooking a ride with turtles. Whilst this is happening, Nemo and his new tank friends hatch a plan to escape from their new home.