Set in Boston in the late 70s, a woman (Brie Larson) has brokered a meeting in a deserted warehouse between two Irishmen (Cillian Murphy and Michael Smiley) and a gang led by two men (Armie Hammer and Sharlto Copley) who are selling them a stash of guns. But when shots are fired during the handover, a heart-stopping game of survival ensues.