Robert Storch, a famous composer and conductor, is about to leave town for a conducting engagement, which delights his wife Christine. She feels under-appreciated and dislikes the evening hours associated with his job. Christine goes to a winter resort and conducts a flirtation with Baron Lummer, who turns out to be an impoverished nobleman searching for a loan. Later on, Christine opens a letter addressed to her husband and is furious to find that it is a love letter from a young woman named Mitzi Meyer. She vows to divorce Robert.

Robert and his friends, including the conductor Stroh, arrange for an evening of male camaraderie and card games, during which they discuss Christine’s volatile temperament. Robert receives a letter from Christine announcing that she is leaving him. Christine visits a notary and asks him to help arrange for a divorce, but the notary suspects that the real reason for her request is her relationship with Baron Lummer. Stroh and Robert realize that Mitzi has mixed up their names – the love letter was meant for Stroh, rather than for Storch. They explain the confusion to Christine, who is reconciled with her husband.