Madeleine and Rosy, age 15, both have issues with boys and sex, which they want to resolve this summer. They are vacationing at a cabin on Loon Lake in Maine. When they meet two local guys at the general store they naively accept an invitation to a secret rendez-vous at a secluded pond on a mountaintop for skinny dipping. After the meeting goes wrong, the girls get lost in the woods and as night falls a happy outing turns into a nightmare.