The concept is of a one-legged cat who falls into a river and is rescued by a giant frog. He then learns that there are many secrets underwater. The frog teaches him how to swim and hold his breath. The frog explains that her is from an underwater society protected by a giant air bubble. It was created by a one eyed squirrel who thought that he could give freaks of nature from land or sea a safe place to live. The frog asks the cat to join and he has to either face the terrifying earth he lives in, or find a "safe" home underwater that he could or could-not trust. Once he chooses, he can't undo his choice.
