Tommy Riley and his father have just moved to start a new life. Tommy's father has accumulated many gambling debts but has found a new job that requires him to travel extensively, leaving his son alone at home. Tommy also has a hard time fitting in at school, having crossed gang members. He takes a job at a local diner and enters into a romantic relationship with Dawn, the daughter of the owner, but is jumped by the gang members outside the restaurant. Seeing how well Tommy is able to fight, a local boxing promoter by the name of Pappy Jack offers Tommy a chance to fight in an illegal underground boxing operation. When two men arrive announcing that Tommy's father owes a large sum of money to pay off gambling debts, Jack convinces his boss, boxing promoter Jimmy Horn to buy out the debt, which forces Tommy to pay off his father's debts by boxing.