Modesto (Raúl Arévalo) is a teacher who sees dead people, which has cost him both lots of money on psychiatrists and the firing from every school he has worked in. His luck changes when he is hired in Monforte and has to teach five students who have turned a prestigious school into a house of horrors. Modesto must get them to pass their pending subject and leave the school once and for all, but it will be no easy task: all five students died twenty years ago.