Calling themselves "The Three Fishketeers," a trio of adventuresome fish, set out across the ocean floor to seek fame and fortune. Toby, bright-eyed and spunky, Finner, aristocratic and thoughtful and Gillas, a big "galumphing" guppy who calmly takes everything in stride meet a "damsel" clearly not in distress. The would-be heroes comically try to help her recover a large pearl. But it isn't long before all four of them are swimming for their lives, and The Three Fishketeers finally learn what heroism really is.