Cece Rios thought saving her sister would be the end of her adventures in the world of criaturas. But part of Juana's soul is still trapped in Devil's Alley. As Cece tries to find a way to get it back using her new curandera abilities, Juana takes her fate in her own hands and sets off alone, intent on restoring her soul and getting revenge on El Sombrerón. But then they discover that El Cucuy, king of the criaturas, is hunting for Cece, craving...