Four mathematicians who do not know each other are invited by a mysterious host on the pretext of resolving a great enigma. The room in which they find themselves turns out to be a shrinking room that will crush them if they do not discover in time what connects them all and why someone might wish to murder them. Written by
Luis Piedrahita & Rodrigo Sopeña
Think inside the box
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Did You Know?
When they're putting the bookcases on the floor and filling them with the books, you can see a green book written by the director with him on the cover. See more
In the movie it is said that Évariste Galois died at 22. In fact, Évariste Galois died when he was only 20 years old. See more
Do you know what prime numbers are? Because if you don't, you should just leave now.
During the end credits, all accents are added later than the text appears. The character Hilbert is seen doing that continuously during the movie. See more
Referenced in Nine Dead
Preludio en Si menor BWV 855
Composed by Johann Sebastian Bach
(as J. S. Bach). Score by A. Siloti
Performed by Federico Jusid See more