Anna, a former sexy nightclub dancer who has become a hospital nurse, is on the verge of taking the veil. One day, She recognizes Andrea, her former fiancé, among the patients. Her troubled past suddenly comes back to her. Though engaged to Andrea, she was attracted to Vittorio, the owner of the nightclub where she performed as a singer and dancer. After Vittorio attempted to rape her, Andrea killed him. Following this tragedy. Anna decided to go into a convent. Andrea, who has been acquitted, now tries to persuade Anna to come back to him but at this very moment it is announced that a train has been derailed. Anna then understands that she must dedicate herself to her new vocation.