Trailer here.
The Film begins in Uruguay in 1993. A Killer goes to the cinema. He is dressed all in black. A girl called Ana(Grasso) comes to the cinema looking for her father who is the projectionist. She tells him to go home and rest and that she will take his place for the evening. There are people coming in to see the movie. There is an old crazy guy, three teens, a couple, a boy and a girl. The killer takes the life of the old man in the cinema. Nobody seems to notice. He takes his eyeball. Cut to Mauricio, the security guard, who is annoying Ana. He doesn't last long, as the killer disposes of him and he closes the shutters of the cinema, locking all inside. Ana has locked the door of the projection office as she does not want to be disturbed. She is studying. Someone tries the door. It is the killer, but she thinks that it is Mauricio. This saves her life. The killer is making his way through the rest of the audience.