A psychopathic man lures his friends into a deadly mouse trap, where pure evil aims to harvest their skin and take on the form of the beloved cartoon character he once helped create. This chilling origin story reveals the dark side behind the most cherished animated figure of modern times.

After accepting temporary work in a laboratory Cesar begins to notice strange events related to the treatment of a patient with the number 27, this disturbs him the extent of causing insomnia and hallucinations. Isela and Marcos, his coworkers attribute this to the Cesar fatigue, however the real reason for these views is more real and dangerous than they think.

Julian, a young man with mental problems kidnaps Montero, a corrupt doctor, to torture him so he could confess his sins.