A disgruntled teenager, sent to do community service at a rundown Karate school, enters an MMA tournament to face the man who killed his parents.A disgruntled teenager, sent to do community service at a rundown Karate school, enters an MMA tournament to face the man who killed his parents.A disgruntled teenager, sent to do community service at a rundown Karate school, enters an MMA tournament to face the man who killed his parents.