The film follows the brutal life of a former boxer, Bradley Thomas (Vince Vaughn), who is imprisoned after a drug deal fails. He loses his job as a car mechanic, and his troubled marriage is about to fall apart. In front of this crossroads of his life, Bradley decides to save his marriage, returning to the financial gains from distributing drugs to a local gangster. This improves its situation, giving a brief period of happiness and security to terrible day in which he finds himself in the middle of a shootout between a group of police officers and ruthless allies. During the altercation Bradley is seriously injured and thrown into prison, where his enemies forced him to commit acts of violence that turns the place into a battleground wild. Trapped in a prison of maximum security, what begins as a fleeting drama turns into a terrible nightmare, as he must fight to stay alive and to protect those whom He loves.