Helped by Roman's sister Shelly, Roman and Peter finally defeat the killer, but tragedy strikes them once more when the time comes for Letha to give birth.
When victims start appearing out of the full moon, Roman and Peter must make preparations to confront the killer and defeat it as soon as possible, unaware that Letha is its next target.
Accused of being the killer, Peter hides away with his mother while Christina disappears without a trace, and Roman finally begins to face the truth about his nature.
A weakened Roman emerges from his coma and reunites with Peter in time to attempt to stop the killer from claiming his next victims.
The next full moon is coming and Chasseur makes preparations to catch the murderer and Peter has a dinner with Letha's parents Norman and Marie after they learn of their relationship.
Roman storms the White Tower looking for answers and discover the secret project of Dr. Pryce, who puts him into a coma. While uncounscious, Roman's dreams lead him closer to the truth about the murders.
Peter plans to leave the city with his mother when he still can, but gives up upon knowing of Chasseur's suspicions, while his relationship with Letha puts a strain in his friendship with Roman.
Peter and Roman's investigation takes them to the Godfrey's old steel mill where they find a missing piece of the puzzle. Meanwhile, Christna has a date with a friend that turns wrong when the memories of the body she found come back to torment her.
After being almost caught by the police, Peter brings the remains to Destiny and gets some clues about the murders. Meanwhile, a gala is held at the Godfrey Enterprises' Tower where things go hectic.
Letha starts feeling attracted to Peter, who looks for the help of his cousin Destiny to use her powers in order to track down the murderer. However, to do that, Roman and Peter must bring her some remains of one of the victims and they get in trouble when the police arrives at the cemetery with the same idea.
A second body is found by Christina, a local student and Dr. Clementine Chasseur arrives at the town to investigate the murders. Meanwhile, Roman decides to find the killer by his own and asks for Peter's help.
Roman Godfrey confronts Peter who was investigating the scene of the crime by himself and the two become friends, with Peter sharing his secret with him. Meanwhile, Roman's cousin Letha discovers that she is pregnant, but claims that the child's father is an angel.
Peter Romancek, a young man and his mother move to the town of Hemlock Grove that gets in alert after a young girl's body is found and the strange rumors about Peter's nature lead the townsfolk to suspect him.
A teenage girl is brutally murdered, sparking a hunt for her killer. But in a town where everyone hides a secret, will they find the monster among them?
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