Tsendsuren Lamjav

In 1928, when scientific hospitals were introduced to Mongolia, the Russian female doctors who came to rural areas and the famous local maarambas overcame old customs, opinions, and religious influences, and showed how people's views were changed and a new morality was formed in their minds.

A young couple's newly married life is suddenly interrupted by the arrival of the baby of her ex-girlfriend, who has given birth to her husband's child and died. The young daughter-in-law must choose between becoming a stepmother or divorcing her husband. The girl chooses the former, and their complicated life story begins. The girl gives birth to two children of her own and lives with her husband and stepdaughter for more than 10 years. In the meantime, the stepmother punishes the stepdaughter by selling her to hard labor in the household and beating her for no apparent reason.

Narankhüu and Sarantuya, who study in a school in the city, go out to the country during their summer vacation and meet Balbar, a shepherd boy. They tell the story of their childhood from the local old man Dandar. However, accidentally attacking a group of thieves hiding there, Erdene reveals the secret of the lover's tank.