In a small village on the outskirts of Florence, a teacher, Leyla, receives a strange 'gift' in the second fortnight of each month: a wicker basket containing a murdered kitten. A small wooden stake engraved with the red writing 'Sempiterna ruìna' is driven into the chest of the animal: it is blood. Her younger sister, Camilla, who has returned from France, is involved in this mystery. A singular 'priest' roamed around. An elderly professor, Maria, passionate about criminology, and one of her former students, Genius, an aspiring investigator, are fundamental to the research. Other crimes are added: an attempted murder with concealment of the body of a woman whose husband becomes the alleged 'visionary' culprit, a death in an arson attack and a stabbing crime. The driver thread, an intrigue branched out into several areas, is sometimes tinged with pink with some tragicomic nuances. Lieutenant Marcus takes charge of the investigation to help Leyla, with whom he is secretly in love. But where will the crux of the matter be? In a mysterious research institute?