Claire Marriott, unable to withstand the advances of her students' father, flees Rome. She decides to visit her godmother to relax before her new job, but on the way she is caught by a thunderstorm. Stopping at a shelter to wait for her, Claire sees a young girl wandering along the road. She invites her into the car, and Paola tells her that she ran away from home from her fiancé, whom she does not love, Marchese Bartaldi, to her lover Fabio. The girl asks Claire to give her a ride to the station, where Fabio is waiting for her and he already has a plan for further actions. Claire, after hesitation, decides to help her...