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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.
- Ben: James Jagger
- Tina: Camille Rowe
- Pierre Montégnac: Eric Savin
- Sarah Montégnac: Carolina Massey
- Mister Montégnac: Alexis Servaes
- Madame Montégnac: Anne Claessens
- Scandinavian Couple: Marie Caffier
- Scandinavian Couple: Marie Bernard
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- Associate Producer: Louis Leterrier
- Production Design: Hubert Pouille
- Editor: Baxter
- Director: Alexandre Bustillo
- Director: Julien Maury
- Executive Producer: David Giordano
- Producer: Matthieu Warter
- Producer: Jean-Charles Levy
- Producer: Eric Tavitian
- Producer: Clément Miserez
- Original Music Composer: Raphaël Gesqua
- Sound Editor: Renaud Guillaumin
- Director of Photography: Jacques Ballard
- Visual Effects Producer: David Danesi
- Sound Effects Editor: Damien Aubry
- Visual Effects Supervisor: Thomas Duval
- 2D Supervisor: Agustín Cavalieri
- Co-Producer: Bastien Sirodot
- Editor: Thialy Sow
- Set Decoration: Ilse Willocx
- Supervising Sound Editor: Roland Voglaire
- Carpenter: Aurélien Bihr
- Sound: Elsa Ruhlmann
- Production Supervisor: Valentine Kervagoret
- Makeup Department Head: Jennifer Courouge
- Producer: Frédéric Fiore
- Co-Producer: Cloé Garbay
- Adaptation: Rachel Parker
- Sound Editor: François Aubinet
- Sound Editor: Olivier Mortier
- Set Dresser: Joris Vandezande
- First Assistant Editor: Samuel Fassi
- Costume Design: Alice Eyssartier
- Colorist: Arthur Paux
- Special Effects Key Makeup Artist: Oriane De Neve
- Visual Effects Coordinator: Théophile Dhuicque
- Digital Compositor: Nicolas Erba
- Adaptation: Julien David
- Associate Producer: Natan Bogin
- Production Assistant: Coline Hieronimus
- Property Master: Marie Willems
- Digital Compositor: Gilles Collart
Credits: TheMovieDb.