A razor-wielding serial killer is on the loose, murdering those around Peter Neal, an American mystery author in Italy to promote his newest novel.
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A serial killer who specialises in killing teachers is on the loose and Andrea becomes accidentally involved when he decides to lend a hand to one of the victims and catches a glimpse of the nocturnal predator.
Madonna Violante goes to Rome to find the three Armida daughters, Lorenza and Vanna, who she has not seen for many years; but first she stops by her friend Antonia from whom he learned many unseemly things about them.
