Paris, the 1980s. Three students decide to celebrate their graduation with a visit of the Paris catacombs. But something, someone, is hunting them. Trapped deep underground, the group needs to get out before it's too late...

Brussels. Leo, a Spanish metro driver, while conducting his train and arriving at a station, sees a young man in distress on the edge of the platform. He recognizes his son Hugo right before he falls onto the rails and then dies a...