Barcelona, Spain. Adrián Doria, a young and successful businessman accused of murder, meets one night with Virginia Goodman, an expert interrogation lawyer, in order to devise a defense strategy.
A couple decides to spend a romantic evening in a floor of a semi-abandoned building that slip because she works as a consultant for the council house and got the keys. During the evening they discover that a hooded murderer is the only tenant left in the building...and they have become the new target.