High-living and uninhibited beauty Marta (Tinto Brass' latest temptress Anna Jimskaya) is unsatisfied in her marriage to her publisher husband Dario (Max Parodi, Frivilous Lola).  When Dario visits a literature festival in the city of Mantua, he negelects Marta.  In a museum Marta meets a tall, dark stranger, Leon (Riccardo Marino).  Together, they embark on a passionate and highly sexual  affair.  Marta keeps record of all of their ever more explicit erotic adventures in her diary for her husband.  The mix of secrets, betrayal and fantasy prove to be most arousing combination and reignites Dario's hidden passions.