One day, Prakash, a young mill worker, along with several labour union representatives, approaches Satyanarayan to request an advance bonus payment for Diwali.

Finally, Prakash offers Chhaya his cottage as a place of refuge and invites her to stay with him and his elderly, poor mother, Gomti.

Prakash and Chhaya continue living happily in the cottage and eventually become parents to three children, whom Gomti lovingly takes care of.

One day, Daulatram introduces a modern machine at the mill and announces the termination of 400 out of the 1,500 workers, a decision strongly opposed by Prakash.

When Daulatram finds the workers gathering at the mill gates becoming increasingly unmanageable, he calls the police for protection and simultaneously hires goons to eliminate Prakash.

Her situation worsens when Gomti is forcibly taken away by her brother, Kalicharan, who confines her with the malicious intent of claiming the cottage in the future.

Matters worsen when a snack shop owner falsely accuses the children of theft and burns the elder girl’s hand with a hot rod taken from boiling oil as punishment.

The film returns to the courtroom scene with Chhaya in the witness box, where she narrates her story and the reasons behind committing the heinous crime.

After narrating her life story, Chhaya collapses in the witness box due to the effects of the poison and later dies in custody.

Vimla urges the court to bring about a change in society's attitude, shouting the slogan that forms the title of the film: Samaj Ko Badal Dalo.