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.

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

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.

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.

As a full moon approaches, Letha's parents discover her relationship with Peter. Despite a crisis of faith, Chasseur prepares to capture the killer.

A weakened Roman emerges from his coma and reunites with Peter to stop the killer. Hemlock Grove braces itself for another lethal full moon.