Plot synopsis: Olga, a single mother in love with her married colleague Vadim, marries Herbert for a business trip abroad. Five years later, she returns to Leningrad with her family and reunites with Vadim, who realizes he still loves her. Both leave their spouses, but Olga struggles in America. Vadim inherits a fortune and a castle in Belgium, where he writes to Olga. She's thinking of returning to him.