The series is based on the Marvel/Image comic book of the same name by Ed Brubaker and Sean Phillips. The series follows multiple generations of criminal families and explores the murders that connect their pasts. Charlie Hunnam as Leo, aka Coward, a criminal mastermind who plans his jobs to use no guns or violence, unlike his father Tommy. Emilia Clarke and Luke Evans as Mallory, an armed robber in a crew, and relationship, with Ricky Lawless.