A year ago, an event occurred in Jill Conway's life from which she could not recover. She managed to escape from the kidnapper, who threw her into a hole in the forest. Clinic treatment did not eradicate confidence in Jill that the maniac would return. The drama is that the police consider her a socially dangerous inventor, because the cops did not find any actual evidence of her words. Since then, Jill has been wandering Forest Park in search of a pit and goes to self-defense classes. Her nightmare comes true when her sister Molly disappears from the house in pajamas in the middle of the night.