Worried by Isabel's mental health, Nieto tries to find a way to keep her away from the Parot case and not expose her to so much pressure.

The investigation takes Nieto to the city zoo. Somebody has freed all the monkeys from their cages. Haro continues playing with Isabel's mind.

Despite the Parot case being assigned to another detective, Nieto pursues a new line of investigation on his own while Isabel tries to adapt to her new life in a mental institution.

Nieto desperately strives to find evidence and prove that the young police officer is the victim of a plan against her. Haro secretly approaches Sol to execute the last step of his revenge plan.