Spiraling out after a bad breakup, Wes ends up at a remote rest stop miles away from civilization. His situation worsens after he finds himself locked inside the bathroom with a mysterious figure speaking to him from an adjacent stall. As Wes tries to escape, he realizes he is an unwilling player in a situation bigger and more terrible than he could possibly imagine.
Forced to travel with her boyfriend, Laine, she begins to experience premonitions associated with the urban myth of The Creeper. Laine believes that something supernatural has been summoned - and that she is at the center of it all.
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.
It follows a college student as she boards a party train for Halloween, and ends up fighting for her life when a mysterious assailant begins killing the people one-by-one.