Four mathematicians are imprisoned in a shrinking room; with the walls closing in, they must try anything to escape this fatal puzzle.
Writing
Riddles that actually work — no cheating the logic
Production
Single location tension that never feels cheap
Acting
Old professor Fermat steals every scene he's in
Director
Rodrigo Sopeña
Trivia, insights & behind the scenes
The character names aren't random — Galois, Hilbert, Pascal and Fermat are all real mathematicians who made massive contributions to number theory.
The 88-minute runtime mirrors the real-time pressure of the room's hydraulic system, making it one of the tightest Spanish thrillers of the 2000s.
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