1956, in the north of France. A group of underground miners is forced to take a professor to take samples a thousand meters underground. After a landslide that prevents them from going back up, they discover a crypt from another time, and unknowingly awaken a legendary bloodthirsty creature.
1915, WWI. French Private Gabriel is presumed dead. Selected for a top-secret program, he’s given a serum that makes him stronger and faster. To see his family again, he must join the Sentinels, elite soldiers on a mission to end the war.