In a decaying French castle, the last living member of a noble family is gravely ill. On his deathbed, he reveals a puzzling will to his greedy relatives, stating that his fortune will be awarded only if his body is found within five days after his death. After the old man vanishes into a secret passage within the castle walls, a frantic search ensues. His relatives are driven by desperation as they scour every corner of the labyrinthine estate, tearing through attics, basements, and hidden rooms in an attempt to discover the elusive corpse. This becomes a race against time as they also struggle with mounting tensions and suspicions among themselves.

As days pass, the eerie castle amplifies cryptic sounds and spectral shadows, raising fears that the old man might have devised a trap from beyond the grave. The claustrophobic atmosphere thickens, revealing the dark secrets and past betrayals that fester within this doomed family. With every hour, paranoia escalates and alliances fracture. Not only are they faced with the mystery of the elderly patriarch’s whereabouts but also with the hidden motives of each family member.