每年，伯爵夫人都会邀请一个贫穷的意大利家庭打牌。

1972, Milano. We are just a few days before the general elections. The daughter of a well-known professor is found dead. Mr Bizanti editor in chief of newspaper "Il Giornale", in agreement with its owner Mr. Montelli, decides to charge of following the story the junior Roveda and the senior Lauri. At one poin…

凯蒂，罗马的一个摄影师，一次意外的目击了一名手挥利刃，带黑色手套的年轻女杀手。于是凯蒂和她的未婚夫阿尔贝托去警方进行报案，发现先前其他目击犯罪的证人都一一死亡。凯蒂担心她会成为下一个受害者。此时她的一位跳芭蕾舞的朋友玛格达也残酷杀害，情况难以捉摸。警方也感到困惑，无法找到一个切入点。这时阿尔贝托发现了一个线索：所有被害…