A cult kidnaps a young girl and sacrifices themselves by the locust moon. The girl awakes, surrounded by corpses. Years later, the locust moon rises again and the girl is captured by a surviving cult member, informing her demon is growing inside all these years.
It follows Samantha and Clara, two students who are staying behind for the holidays at their boarding school who must survive the night against uninvited visitors.
Martha and Félix are the children of the Butcher of Mons, a notorious Belgian serial killer from the 1990s. Unstable and riddled with insecurities, Martha lives vicariously through social media. Her brother, crushed by the family legacy, takes over their father's killings. Harassed and violently assaulted at work, the docile Martha falls into madness and goes through the looking glass into the strange and terrifying world inhabited by her brother.
Young heroine Kennedy and her friends find themselves at Terrace Lanes on its last night of operation. When chaos breaks out, Kennedy and her father must come together to try and save their friends and survive the night.