In this brutal survival horror tale set in the Warhammer 40,000 universe, young Sister of Battle Isolde embarks on her first mission to an uncharted world, unaware that it hides an ancient, deadly secret. As the Sisters of Battle are systematically hunted, Isolde must rely on her faith, training, and sheer will to survive. Trapped in a labyrinth of tombs, she faces an unimaginable terror, questioning if her devotion to the Emperor will be enough to save her from the relentless, soulless enemy.