Inspectors Velarde and Alfaro must find what appears to be a serial killer. This hunt against the clock will make them realize something they'd never thought about: neither one of them is that different from the killer.

4 mathematicians are invited to solve an enigma. Once there, they're locked in a mechanically shrinking room and given 1 minute to solve each puzzle via cellphone while also figuring out why they're there.

A man who is being driven crazy by the noise in New York City decides to take vigilante action against it.