When Nemo the clownfish is captured and brought back to a dentist's office in Sydney, Australia, he is greeted by a gang of friendly fish! The Tank Gang liked Nemo so much that they made him one of them. So when the fish learn that the dentist is giving his niece—Darla the fish killer—Nemo for her birthday, the Gang is determined to get Nemo back to the ocean and away from Darla. But will their escape plan work?