After totally annihilating and capturing Hercules, Zeus sends a mammoth four arm and twin cock mutant monster to destroy Nightbully and rescue Hercules. Fearing that Nightbully's labyrinth may contain some special power for Nightbully, Zeus transports the two muscle monsters to a desert island to battle it out, with the loser impaled on a giant stone dildo in the middle of the ring. It turns out to be a savage physical and sexual battle to the end.