Taylor-Johnson is starring a hit man/fixer named Olav who is hired by his mob boss to kill the man’s cheating wife. After Olav convinces himself he’s fallen in love with the wife and doesn’t kill her, it sets off a chain of events with tragic consequences that threaten a bloody mob war.
Character descriptions were not revealed, although it is believed that Cumberbatch is playing a rival mob boss named the Fisherman.