What would you do if your best friend was killed right in front of you, and the assassin fled without a trace and was never found? Would you wait forever for justice to run its course, or take it into your own hands? What would you do if you were a private investigator specializing in defending indicted felons but was forced to switch to the other side of the street to hunt down a killer? If your family is threatened along the way, and someone tries to kill you, would bringing the murderer to justice satisfy you? Or would you want something more? Welcome to the murky world of boxer Danny Cullen and former legendary DEA agent Frank Boff, a world where the line between right and wrong gets bent out of shape and the only real satisfaction is vengeance. They are the unlikeliest of teams. Cullen is a disciplined professional boxer who plays by the rules. Boff is a maverick investigator who believes anything goes as long as he doesn't get caught doing it. They have nothing in common except the mission: find out who killed Cullen's best friend, world champion boxer Julio Babbas. Neither attempts to hide their disdain for each other. But like it or not, they find themselves travel partners on a journey into a Shadow World where Cullen's friend lived and died. What they find there shocks Cullen and eventually pulls him over to the Dark Side, a place Boff calls home. Constantly in conflict, they find a common ground: find the killer and seek a punishment more just than justice: "The Hurting Game."