They killed his friend, stele his money and put him in jail - now G.J. Thunderbird (Jorge Rivero) must use his courage and fists to avenge the death of his friend and regain his honour. G.J. descends into the world of bare fisted boxing, where he meets a high-profile promoter, called Vance (Mike Connors). Vance asks C.J. to join his league of fighters, hut he will only join if he is allowed to fight Rhino (Matthias Hues) - the fighter who murdered his friend. Vance agrees and the fight takes place in a warehouse, but before it is over, the police raid the warehouse and arrest G.J. Now G.J. must somehow find a way out of prison and ensure that Rhino is brought to justice.