From Mathieu Turi, director of Meander and Hostile , comes a creature feature that will take you into the deepest darkness, to the edges of a vast and horrifying imagination. It is 1856: due to a collapse, a group of miners find themselves trapped in the bowels of a coal mine in Northern France. They will soon realize that they are not alone... Decades later, the team of expert miner Roland is forced to accompany Professor Berthier underground to carry out surveys and collect samples. Blocked by a landslide, they will have to face the insatiable hunger of an ancient mutant.