Juana is a nun with a strong character marked by a paranormal experience. A mysterious order from the Archbishopric will take her to an old church in old Madrid, built on a network of passageways of unknown origin. There, Juana will discover that in the bowels of the building there is something prior to the legends that are explained about that place. And the Evil that lives there has begun to infect the exterior.
Lucía, a club dancer on the run, takes refuge in a sinister building on the outskirts of Madrid where her sister Rocío lives with her daughter Alba.
Coslada, near Madrid, Spain, October 2015. Hundreds of extras are trapped in a huge stage where they pretend with hysterical joy that they are celebrating a party that will be broadcast on television on New Year's Eve. But more than a week later, the clash between several staff members threatens to prolong indefinitely such a maddening nightmare.