Good Children Keep Silent.

Emma is a journalist investigating the disappearance of her sister, Vlada. She suspects a connection to the "Educator," a serial killer active ten years ago, but her investigation hits a dead end. Her only lead is Danila, a former victim of the Educator, who knows about the secret cabin and offers to show it to her. However, the trip turns out to be a trap: Danila is a follower of the Educator, and Emma is his next victim.