Colonel Graven and the 401st Krieg Regiment descend into the haunted depths of Oleris III, a desolate world of tombs and catacombs, searching for a vanished inquisitor. As they navigate the winding ossuary tunnels beneath the surface, the dead begin to rise. Graven must confront the spectres born from his own tragic past while pushing forward through an increasingly nightmarish landscape. A tale of duty, redemption, and the horrors that lurk in forgotten places.