In a future world where humans and Revenants coexist... Due to the sudden appearance of the Luna Rapacis, Revenants have transformed into mindless monsters called Horrors. As a Revenant hunter, the player shall halt the world's inevitable collapse by traveling to the past with a girl called Lou who possesses the power to manipulate time. An epic adventure awaits, where you and your chosen partners explore a post-apocalyptic world, face fierce battles against powerful enemies, and uncover an epic story that transcends time.