After resolving a test with a sequence of numbers, four mathematicians are challenged by a mysterious man called Fermat to meet in an isolated place to resolve the greatest enigma ever. Each one receives a code name - Hilbert, Pascal, Galois and Oliva - and heads to a barn in an island. Inside the barn, they find a comfortable room, and sooner their host arrives. They have dinner together and Fermat receives a phone call from the hospital where his daughter in interned in coma. He asks to leave the place for one hour; however, after his departure, the quartet finds that they are locked up in the room. They receive a phone call with a mathematical riddle, giving one minute to their reply; sooner they find that if they do not answer to the questions, the walls move and room shrinks pressed by four Poseidon hydraulic presses. While responding the questions, they try to find the motives why they have been gathered together to be killed.

Doctor:
You can't go on like this. You have to get out. I'm speaking as a doctor, not as a friend.


Hilbert:
You tell me three times a day. Three! I'm speaking as a mathematician, not as a friend.

Composed by Johann Sebastian Bach (as J. S. Bach). Score by A. Siloti
Performed by Federico Jusid