Jimmy Conlon (Liam Neeson) has gained a reputation for being one of the greatest hit men to work for mob boss Shawn McGuire (Ed Harris). The friends have steadily avoided the law and have dodged detectives for the past 30 years.

Now 55, Jimmy finds himself at yet another crossroads in his life – choosing between his crime family and his actual family - when he discovers that his estranged son Mike (Joel Kinnaman) might be heading down a dark and twisted path. Jimmy is reunited with old friends, foes and demons as he works to protect his family.