While diving in a remote French lake, a couple of YouTubers who specialize in underwater exploration videos discover a house submerged in the deep waters. What was initially a unique finding soon turns into a nightmare when they discover that the house was the scene of atrocious crimes. Trapped, with their oxygen reserves falling dangerously, they realize the worst is yet to come: they are not alone in the house.


Eric Savin
Pierre Montégnac
Carolina Massey
Sarah Montégnac
Alexis Servaes
Mister Montégnac
Anne Claessens
Madame Montégnac
Marie Caffier
Scandinavian Couple
Marie Bernard
Scandinavian Couple


Louis Leterrier
Associate Producer
Hubert Pouille
Production Design
Julien Maury
David Giordano
Executive Producer
Raphaël Gesqua
Original Music Composer
Jacques Ballard
Director of Photography
David Danesi
Visual Effects Producer
Damien Aubry
Sound Effects Editor
Thomas Duval
Visual Effects Supervisor
Ilse Willocx
Set Decoration
Roland Voglaire
Supervising Sound Editor
Valentine Kervagoret
Production Supervisor
Jennifer Courouge
Makeup Department Head
Cloé Garbay
Olivier Mortier
Sound Editor
Samuel Fassi
First Assistant Editor
Alice Eyssartier
Costume Design
Oriane De Neve
Makeup Department Head
Oriane De Neve
Special Effects Key Makeup Artist
Théophile Dhuicque
Visual Effects Coordinator
Nicolas Erba
Digital Compositor
Julien David
Natan Bogin
Associate Producer
Coline Hieronimus
Production Assistant
Marie Willems
Property Master
Gilles Collart
Digital Compositor