Marlin, an anxious and over-protective clown-fish, lives in the Great Barrier Reef with his Child Nemo, who longs to explore the world beyond their anemone home. But when Nemo is captured and taken to Sydney, Marlin faces his fears and sets off on an epic adventure across the ocean. With the help of lovable characters such as optimistic Dory, laid-back sea turtle Crush, and the supportive Tank Gang, Marlin and Nemo both overcome challenges on their journey to find each other and themselves.