Mithi, a young woman, is determined to not change her surname after marriage. Her husband is meek but supportive and a true liberal. Her in-laws have a problem with it till the time, Mitali starts supporting Mithi in her quest, finding herself a comrade in the right cause where even she wants to keep her maiden surname now.

Inspired by true events, in the winter of 1924 Kolkata, amidst the fervour of the Indian Nationalist Movement, an 18-year-old torn between personal convictions and the call for national duty is recruited by a seasoned freedom fighter. Tasked with a pivotal mission against the British, the boy's internal conflict escalates when he's required to prove his loyalty through the assassination of a British informant. As the consequences of his actions unfold, the narrative intricately weaves the fate of an orphaned little girl into the tapestry of loyalty, sacrifice, and the relentless struggle for independence. Set against the socio-political turbulence of the era, this historical drama delves into the profound choices individuals make within the complex fabric of a nation's fight for freedom and intertwines the tumultuous events of the Indian Independence Struggle with the haunting realities of children caught in conflict zones.

The film follows Mrinal Sen in his early days around the time of India’s independence, where he is a struggling idealist with an all-consuming hunger for cinema but unable to feed himself or his young wife, to 1950s Calcutta, where (alongside Satyajit Ray) he helped start the Indian New Wave cinema movement.