A harmless child’s doll becomes possessed by the spirit of a killer shark! – “Sea Shark Swim” is all the rage in children’s entertainment. One of its biggest fans, a young boy named Kirby, receives a special gift from his dad, the famed shark hunter Brock Banner – the doll from the show! However, Brock, thinking it would be a lucky charm, has hidden a tooth from a nasty shark inside the toy. Soon the doll becomes possessed by the spirit of the evil sea beast!