In a Swiss resort, Winterborne meets a pretty young American girl who seems to have no qualms about talking to strangers. During the course of their conversation, she mentions her desire to visit the castle across the lake. Winterborne declares that he would be delighted to accompany her. A few days later, Daisy introduces him to her mother, and Winterborne fears that Mrs. Miller will deeply disapprove of his invitation. Instead, Mrs. Miller readily agrees as long as she does not have to go along. That night Daisy suggests a boat ride on the lake. Even though it would be improper, Daisy insists, but she suddenly changes her mind on learning that her brother is in bed. Winterborne is perplexed and confused