Angga (Chairil JM) witnesses his adoptive father being tortured, but when he tries to rescue him, Angga is thrown into a river. Angga is given his inheritance, a box containing a necklace and a lash called the Fire Whip, which has the power to make his body as strong and hard as stone. With his new power and the help of some martial arts misfits, Angga seeks revenge against the murderous gang of robbers behind his father's death.
