Roman confronts Peter at the crime scene, finding common ground. Letha reveals a shocking secret and Olivia and Norman fall into old habits.

Christina discovers a new victim and Sheriff Sworn gets outside help from Dr. Chasseur. Now a suspect, Peter joins Roman to find the killer.

Peter and Roman follow Lisa Willoughby's trail to the old steel mill where they find a missing piece of the puzzle. Christina's date goes poorly.

Shelley commits an act of independence, Chasseur questions Roman but crosses paths with Olivia, and Peter and Roman's friendship takes a turn.

As Olivia and Chasseur face off at the Mill, Shelley learns the awful truth about her family, and Peter and Roman uncover the killer's identity.

The tragic conclusion to the Hemlock Grove killing spree leaves both the Godfrey and Rumancek families devastated, with the final horror yet to come.