When veteran hit man Jimmy Bobo (Sylvester Stallone) and his partner, Louis (Jon Seda), kill a corrupt ex-cop, Louis in turn loses his life to an ex-mercenary named Keegan (Jason Momoa). Detective Taylor Kwon (Sung Kang) senses a connection between the two killings and seeks out Bobo, who subsequently saves Kwon from an assassination attempt. The pair join forces against a common enemy: a ruthless real-estate developer named Robert Nkomo Morel (Adewale Akinnuoye-Agbaje).