Set in the fictional town of Levante in the summer of 1992, revolves around the disappearance of three teenage girls, Sandra, Eva and Malena, who visited the local nightclub and never seen again. The police don't seem to be looking in the right direction, so Javi, Sandra's little brother, begins an investigation with Quino and Álvaro, his best friends, and Zeta, the class bully. Together they discover that those who have their sister are not of this world.