Sonia, Max and Henry are three young students, recently graduated, who decide to have fun visiting the catacombs, before Henry has to report for mandatory military service. They are far from suspecting that their expedition will turn into a nightmare. They will try to escape from a strange creature hiding in the bowels of the Earth and reach the surface to save themselves from its clutches.—Mahou 5 star
Paris, the early 90s. Three students decide to celebrate their graduation with a visit of the Paris catacombs. When they discover the legendary 717 Bunker. Little do they know it's not the only thing Nazi soldiers have left behind them.