Heinz is Amsterdam personified: a happy-go-lucky freeloader. However, he's in big trouble with his girlfriend Dolly. One day he is looking after their baby - the next day he finds himself on a mysterious island, and his son is missing! As he searches desperately for the boy, Heinz discovers he's been an unwitting pawn in the evil schemes of the diabolical windbag Git. During a spectacular showdown in New York, Heinz thwarts Git's attempts to eradicate mankind and rescues his son - sort of....