Pivoting around four stories from Frank Miller's Sin City universe, three tainted anti-heroes of Basin City, the cradle of crime and corruption, cross paths in their search of redemption. On the brink of retirement, Detective John Hartigan, the vile city's last honest cop, breaks every rule in the book in his crusade to save the innocent eleven-year-old girl, Nancy Callahan, from the clutches of the well-connected child molester, Roark Junior. Meanwhile, in another part of the town, bearing the deep scars of endless fights, Marv, the hulking ex-convict and grotesque brute with the killer fists, finds himself framed for a crime he didn't commit, hell-bent on revenge and murder. Finally, as a bloody act of justice in the Old Town, the city's red-light district, threatens the already delicate truce between the local prostitute community and the police, the taciturn private eye, Dwight McCarthy, becomes a protector after helping their cause. Can there be justice without sin?