The testament of Giulio Donati, who had been killed two months earlier, contains an amazing condition: having discovered that his wife, the beautiful Sarah, was deceiving him, he leaves her all his condition, provided that she humbled herself, putting her body in the lust of passion for a large number of unknowns and provided that her forced pranks were removed by her own lover. The cassette will then be transferred to a notary for control. For Sarah, the goal is too high: she accepts all the conditions of the will. At first, doing everything with great apprehension, and then with increasing pleasure, she should also be exposed to the difficult questions of the police lieutenant, rival Colombo, who is investigating the murder of her husband. And even further, she discovers that her lover Philip will deceive her by having fun with seductive call girls ...