Military doctor Vladimir Ustimenko is a man of duty and honor, committed to the cause he serves, and one single love that he carries through his whole life: Varvara Stepanova is a whimsical girl who dreamed of becoming a great actress but eventually became a geologist. The war will cruelly interfere in the fate of the heroes and confuse their relationship even more.

Gunner-gunner Corporal Vasily Kochetkov meets Valya Gradskaya, a saleswoman at the military trade center, and becomes a frequent guest in her family. He soon realizes that the girl and her grandmother are spies. Kochetkov informs the command of his suspicions and is given the task of continuing to play the role of the groom.