A cop and a killer forge a shaky partnership to find out who killed their partners in this throwback buddy action flick starring Sylvester Stallone, and directed by vet Walter Hill. Battle-scarred New Orleans hitman James Bonomo (Stallone) and his longtime partner Louis (Jon Seda) have just executed their latest hit, a cop named Hank Greely (Holt McCallany) when Louis is killed by hulking enforcer Keegan (Jason Momoa) before they can get paid. In the wake of a failed attempt on Bonomo's life as well, Keegan flees the scene, but not before his intended target gets a good look at his face. Meanwhile, Korean NYPD cop Taylor Kwon (Sung Kang) shows up in town determined to find out who killed Greely, his former partner. When Kwon tracks Bonomo down to find out who hired him, both realise that their best hope for catching their respective partners' killers is to team up. Before long, their trail of clues has led them to sleazy lawyer Marcus Baptiste (Christian Slater), who is currently caught up in some shady business dealings with the mysterious and powerful Robert Nkomo Morel (Adewale Akinnuoye-Agbaje) that could implicate some serious power players in Washington, D.C. Now each new move that Bonomo and Kwon make could be their last, and as the cop does his best to stay on the right side of the law, the killer uses the only tactics he knows to get results. But even if they manage to get their man, that doesn't change the fact that they'll have to deal with one another once they've taken down their target.