Pereyra Iraola, the headmaster, has died under strange circumstances. Amparito Conejo, the secretary, who was hopelessly in love with the dead man and is sure that the crime was committed by someone in the school, swears she will find the killer. Over the course of 9 chapters in which she introduces each suspect, the sad and furious secretary will note each candidate's possible motives for committing the crime in her notebooks. Kuchirski, the highly gifted student who can't stand being a child; the caretaker, a former star of Uruguayan football; Marta the organiser of the illegal football pool who has mafia connections; Goyeneche, the school counsellor, who has a wooden leg and is an amazing tango singer; they are all linked by a dark history with Iraola that stimulates the criminal imagination. All are humorously and sharply presented. Each reader will choose their prime suspect for the crime and will have to read to the surprising end to fully understand everything.