The game's plot is slightly inspired by that of Richard Donner Lady Falcon's movie. An ancient spell, transmitted from parents to children, turned the muscular Bully into a fish and the indomitable Monica into a hawk. Each plenilunio one of them is transformed and the other recovers its normal form, which prevents them from being together.

Only an extraordinary phenomenon can break the spell, an eclipse of the sun ... the BLACK SUN. To break the spell, Bully must first release Monica from her cage so that, turned into a fish, they arrive together in time to the sacred underwater temple of the sun, a cave located in the submerged city of Hydrionis, just at the moment it occurs the eclipse.