An embittered concierge at a Barcelona apartment building plots to make one happy-go-lucky resident miserable in this psychological thriller from [Rec] and [Rec]2 co-screenwriter/co-director Jaume Balagueró. Luis Tosar is Cesar – a mournful, seemingly invisible concierge, whose obsession with one resident, Clara (Marta Etura), spirals out of control. Carefree and cheerful, Clara's joy torments the increasingly despairing doorman. Convinced he can only assuage his unhappiness by making others miserable, Cesar resolves to make her suffer. Anonymous letters, chloroform and cockroaches are just some of the nasty surprises in his bag of tricks. Cesar's diabolical plan begins to unravel when his pre-teen neighbour, Ursala (Iris Almeida), becomes wise to his ways and starts blackmailing him. Set mostly within the confines of the apartment building, the sense of claustrophobia is palpable. The multi-Goya nominated Tosar (star of last year's Cell 211) delivers an unnerving performance that will make your skin crawl. For fans of white-knuckle thrills, Sleep Tight is a knockout.