In December 2004, close-knit family Maria, Henry and their three sons begin their winter vacation in Thailand. But the day after Christmas, the idyllic holiday turns into an incomprehensible nightmare when a terrifying roar rises from the depths of the sea, followed by a wall of black water that devours everything in its path. Though Maria and her family face their darkest hour, unexpected displays of kindness and courage ameliorate their terror.
| Production | Shaheen Baig | Casting |
| Art | Eugenio Caballero | Production Design |
| Production | Álvaro Augustín | Producer |
| Production | Belén Atienza | Producer |
| Production | Ghislain Barrois | Producer |
| Directing | J. A. Bayona | Director |
| Writing | Sergio G. Sánchez | Writer |
| Sound | Fernando Velázquez | Original Music Composer |
| Camera | Óscar Faura | Director of Photography |
| Costume & Make-Up | Maria Reyes | Costume Design |
| Costume & Make-Up | Anna Bingemann | Costume Design |
| Costume & Make-Up | Sparka Lee Hall | Costume Design |
| Costume & Make-Up | Montse Ribé | Makeup Effects Designer |
| Sound | Stephen McLaughlin | Music Score Producer |
