Bullet to the Head is a 2013 action film, co-written and directed by Walter Hill based upon Alexis Nolent’s French graphic novel Du Plomb Dans La Tete. The film stars Sylvester Stallone, Sung Kang, Jason Momoa, Sarah Shahi, and Christian Slater. The film premiered at the International Rome Film Festival on November 14, 2012 and was released in the United States on February 1, 2013.
In New Orleans, hitman Jimmy Bobo (Sylvester Stallone) and his partner Louis Blanchard (Jon Seda) eliminate a corrupt policeman, Hank Greely (Holt McCallany). Later, at a bar, Blanchard is murdered by Keegan (Jason Momoa), who also attempts to kill Bobo, but fails.
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 Bobo down to find out who hired him, both realize 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 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 Bobo 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.
Summary via Wikipedia.