The narrative begins with philosophical debates about happiness, contrasting Lida's belief in the joy of labor for others with her personal dissatisfaction.

Despite this, she agrees with her uncle's practical advice to focus on her job and studies, shelving her theatrical aspirations for her sister’s well-being.

Years pass, and Lida, now sick after a skiing trip organized by her old friend Kirill, rekindles their bond despite his marriage.

Their secret relationship strains everyone, particularly Nadya, who clashes with Lida over her choices and confronts Kirill’s wife, Shura, a cheerful and unsuspecting teacher.

In the end, Lida chooses to leave Kirill, finding strength in separating herself from the tangled emotions that defined her relationships.