On a rainy summer night, Théo wakes up in his bedroom and realizes his parents and his sister Louise have disappeared. The true nature of the world lays itself bare. Ghosts, Phantoms and Revenants haunt Théo inside the catacombs and dark places where he searches for his sister. Always a step behind and never able to catch up. What happened? What does it mean? Why is this place so familiar? That's how his journey begins.