New students start school at Las Encinas as Guzmán continues to mourn his sister and Christian struggles with his secret. A classmate goes missing.

Seeking the truth about Marina's death, Samuel attempts to seduce Carla. Lu's new friend, social media guru Cayetana, hosts an impromptu party.

Polo and Ander have a heart-to-heart. Nadia gets creative to stop Guzmán from drinking too much and doing drugs. Rebeka's mother offers Samuel a job.

Pressured by his friends, Polo's guilt overwhelms him. Cayetana's mother threatens to reveal her secret. Ander and Guzmán argue with their partners.

Rebeka teases Cayetana with what she's learned. The Halloween party takes a troubling turn. Samuel walks in on a shocking scene.

Lu blackmails Nadia, and Samuel confronts Carla with his suspicions. In the future, Guzmán is interrogated about the missing student.

Painful truths and dark secrets are exposed as the students unburden themselves and the circumstances behind Samuel's disappearance are revealed.