Three months after his sister and her two friends disappear without a trace, Javi and his buddies, Quino and Álvaro, set out to follow clues the police won't.

While Álvaro clings to life in the hospital, Javi has a terrifying encounter and realises someone is after the gang; as the town mourns lives seemingly lost to a terrible accident, Javi's friend Bea suspects foul play.

The mortician warns the gang to find a portal to the next world; Bea looks into her own mother's death, and new evidence leads Costa and Mario to believe that the girls were kidnapped by a local seaman.

When complications arise from a risky plan, chaos and fear drive a wedge between the boys; Bea helps Olivia make sense of her grandmother's mysterious belongings.

The gang chases down a ghost for information about the girls' location; Javi attempts to guide his father in the right direction; Olivia avoids the truth about her newfound "gift"; Bea seeks answers about her mother's connection to the kidnapping.

While the undead orchestrate a grand illusion to throw everyone off their trail, Costa begins to make sense of a chilling pattern; Olivia leads the charge to figure out where the girls might be.