Alessandro Salieri long ago decided that he would never again get involved with night butterflies—priests of love. But he couldn’t pass by this girl: she looked so pitiful and unhappy. Besides, she seemed like a complete girl—about eighteen, no more. Of course he wanted to help. He brought the girl to his apartment, and in the morning—on the kitchen floor—he discovered her corpse. Someone had brutally stabbed the unfortunate girl with a knife. And given the locked doors and windows, the police have no suspects other than Salieri himself…