该电影由杜奇奥·泰萨利执导，赫尔穆特·贝格、贾恩卡洛·斯布拉贾、伊妲·伽利、温迪·德奥利芙、金特·施托尔、沃尔夫冈·普莱斯、洛雷拉·德卢卡、Peter Shepherd、盖比瑞拉·德奥利芙、斯特法诺·奥佩迪萨诺、安娜·金尼曼、达娜·吉亚、Federica Tessari、凯荷·安德烈、卡拉·曼奇尼等主演，于1971年上映。在100分钟的叙事中，《血蝶》（又名：The Bloodstained Butterfly）Duccio Tessari’s rare Giallo starring Helmut Berger, Giancarlo Sbragia, Evelyn Stewart, Silvano Tranquilli & Carole Andre. A young student is murdered in a park by an unseen assailant during a heavy thunderstorm. The murderer makes his escape, but is identified by a number of people at the park exit. A sports presenter from a local TV channel, Alessandro Marchi, is quickly arrested, and despite protestations of innocence, is charged with the murder. Marchi calls his lawyer, who promises to have him released very soon, but when it comes to the trial the lawyers case is a weak one, full of holes, and Marchi is duly found guilty. All is not what it seems and it soon becomes apparent that the lawyer is having an affair with Marchi’s wife and obviously does not have Marchi’s best interests at heart…