Based on writer Max Allan Collins and illustrator Richard Piers Rayner’s serialized mystery comic novel for DC Comics, the film is set in Depression-era Chicago and revolves around hit man Michael Sullivan, known to friends and enemies as a dangerous man. Uncompromising in his work, Sullivan is just as devoted to his private life as a husband and father of two young boys. But when his two worlds collide, leading to the death of his wife and youngest son, Sullivan and his surviving son, Michael Jr., leave their peaceful home life behind and embark on a journey of revenge.