Two determined French detectives embark on separate investigations: one delves into a shocking murder at a secluded mountain university, while the other probes the disturbing desecration of a young girl's grave by a group of skinheads. Their paths converge as clues from both cases intertwine, leading them deeper into a web of violence. As they collaborate, the detectives uncover a chilling connection between the murders and a series of sinister secrets lurking beneath the surface of their seemingly tranquil surroundings. Tension escalates as they race against time to unveil the truth behind the horrors.