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.
| Actor | Role |
|---|---|
| MMarcos DuarteNot listed | Not listed |
| IIsaac PérezNot listed | Not listed |
| IItzel EncisoNot listed | Not listed |
| EEnrique VillanuevaNot listed | Not listed |
| DDenisse RuizNot listed | Not listed |
| RRoberto G. AlegreNot listed | Not listed |
 Alejandro G. AlegreNot listed | Not listed |
 Fernanda BorchesNot listed | Not listed |
 Clarisa RendónNot listed | Not listed |
| AAngel GarnicaNot listed | Not listed |