New students start school at Las Encinas; Guzmán continues to mourn his sister; 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; Rebeca'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.

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

Lu uncovers a secret while helping Cayetana with her fundraiser party. Omar worries about Samuel's fate. Ander's behavior confuses Guzmán.

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