It's peak season at Morzine-Avoriaz ski resort. French high mountain state police officer Constance Vivier and Swiss cop Andreas Meyer investigate the suspect death of a teenager, found freezing on a slope after an alcohol coma.
Pierre and Patricia have some friends around for Christmas Eve. But the evening is not going to unfold exactly as intended. A stranger bursts in and threatens each guest until they confess their little secrets and lies...
