Two sisters see their world turned upside down when they discover a horrifying and otherworldly secret involving their parents.

Feria, Andalusia, mid-1990s. Two sisters, Eva and Sofía, discover that their missing parents are actually two monsters who, before disappearing, committed a horrendous crime that cost the lives of 23 victims. The two sisters have to face the consequences of their parents' actions in a town where the inhabitants are not as naive as they seem and reality hides a fantastical universe.