Kid is an anonymous young man who fights in an underground fight club nightly, wearing a gorilla mask to protect his identity. He spills blood and bruises countless opponents for meager cash. One day, a rare opportunity arises for Kid to infiltrate the lives and enclave of the rich and sinister, those responsible for his painful childhood. As his suppressed rage and vengeance reach a boiling point, Kid's mysteriously scarred hands unleash a campaign of explosive revenge toward those who stole his innocence.