Ganga Singh lives near Gangotri with her brother, Karam. One day she comes to the assistance of a young man, Narendra Sahay, who has come with a group of Calcutta-based college students to study the source of the holy river Ganga, and to get some holy water for his wheelchair-bound paternal grandma. Both are attracted to each other, and on the next Puran Mashi get married, and spend the night in close intimacy. Narendra leaves, but promises Ganga that he will be back soon. Months go by, but he does not return. She gives birth to a son, and as soon she is able to, she starts her journey to Alipor, Calcutta, to confront Narendra and ensure a better future for their son.