The return of Marianne Roberts to the prestigious Anna Caritas College seems to have triggered a series of bizarre events in the small town of Saint-Hector. William Walker never believed in such phenomena. Yet when he and his friends decide to interrogate the afterlife, they wake up something strange in Sabrina Viau's house, and soon, this supernatural force seems to attack them without respite. Forced to admit helplessness to the invisible enemy, William, accompanied by his faithful accomplices Anthony and Gabrielle, will have no choice but to turn to the one he was trying to avoid at all costs: Marianne.