In 1964, during the construction of an electric dam, a macabre discovery causes a serious incident. Thinking that the communication outage on the construction site is caused by a broken telephone line, Raymond and Fleurian are sent to the site to repair it. They will be the first to discover what really happened to the workers...

In a vast forest, a girl is lost and screams for help. When she finally finds a small, deserted path, she notices a human figure chasing her. She tries to lose him in the forest, but the man manages to find her hiding behind a rock. The girl is trapped and must accept her assailant's sinister invitation.