Over the last few years, more than 300 people have gone missing without trace in a densely forested area to the north of St. Petersburg. The few corpses ever found were all completely naked and showed no signs of violent death.
While out on a training exercise, a team of search and rescue volunteers is alerted of a missing teenage boy and sets out on a mission to find him. As they go deep into the forest, the team encounters an evil entity. Local legend has it that the area is inhabited by the spirit of a murdered witch referred to as the Limping Widow. Locals believe that anyone who encounters the Widow is doomed to perish.