Synopsis

Dean and Sam find themselves embroiled in a peculiar murder case, uncovering a disturbing connection to the Styne family through a shared tattoo. Elsewhere, Castiel mediates a tense collaboration between Charlie Bradbury and Rowena MacLeod as they are compelled to work together on the Book of the Damned. News of his mother's disappearance prompts Crowley to seek assistance from a long-standing adversary.