The tragic conclusion to the Hemlock Grove killing spree leaves both the Godfrey and Rumancek families devastated, with the final horror yet to come.
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.
Peter and his mother hide from vigilantes seeking the killer, while Christina disappears and Roman finally begins to face the truth about his nature.
A weakened Roman emerges from his coma and reunites with Peter to stop the killer. Hemlock Grove braces itself for another lethal full moon.
As a full moon approaches, Letha's parents discover her relationship with Peter. Despite a crisis of faith, Chasseur prepares to capture the killer.
After drunkenly attacking the Godfrey Institute, Roman falls into a coma and embarks on a subconscious journey of shocking truths and revelations.
Shelley commits an act of independence, Chasseur questions Roman but crosses paths with Olivia, and Peter and Roman's friendship takes a turn.
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's connection to Dr. Pryce is further revealed, Destiny helps Peter understand the recent murder, and the gala at the Tower goes horribly awry.
Letha's interest in Peter takes a turn. Chasseur and Sworn's investigation hits a new low, while Roman and Peter stay one step ahead.
Christina discovers a new victim, and Sheriff Sworn gets outside help from Dr. Chasseur. Now a suspect, Peter joins Roman to find the killer.
Roman confronts Peter at the crime scene, finding common ground. Letha reveals a shocking secret, and Olivia and Norman fall into old habits.
A teenager is murdered in the woods of Hemlock Grove. Evidence points to an animal attack, but suspicions soon fall on Peter, the newly arrived gypsy.