Three girls disappear in the Levante. Javi, brother of one of them, his friends Quino and Álvaro and Zeta, the high school bully, decide to look for them on their own. Together with her friends, Olivia and Bea, they discover a secret in the Paraíso nightclub related to the disappearance.

Álvaro is the only one who can tell what they found in Paradise. Javi has a strange encounter in the hospital and discovers that someone is after them. Costa tries to shed light on the whereabouts of the missing girls.

The Shroud tells the gang that there are some supernatural beings, the Undead, who seek to hunt them down. Costa discovers the tunnel the boys found, which makes him suspect that someone from the town is a possible captor.

Javi and the gang chase a ghost to try to find out where the girls are being held. Javi manages to convey information to his father, but the Undead come forward with a masterful move.

The Undead deceive everyone by making a false revelation. The boys make a great discovery at the Aigües de Busot Spa. Costa discovers that the cases of three missing minors happen every three years in Levante.