Yeh Aag Kab Bujhegi

Sunil Dutt as Professor Krishnanand

Kabir Bedi as Ranveer Singh

Rekha as Professor Radha (Professor Krishnanand's Collige & Social Worker)

Pradeep Kumar as Radha Father

Satyen Kappu as Raghubir Singh

Sheeba Akashdeep as Pooja (Professor Krishnanand's Daughter)

Dina Pathak as Pooja Dadi

Shakti Kapoor as Mohan Agarwal (Pooja's Husband)

Bindu as Mrs. Agrawal (Mohan's Mother & Pooja's Mother-in-law)

Roopesh Kumar as Kanhaiyalal Gupta

Ranjeet as Suleiman

Mukri as As Krishnanand House servant

Iftekhar as Judge

Sudhir as Investigating Officer

Bharat Kapoor as defence Lawyer of Mohan Agarwal

Chandrashekhar as Senior Police Commissioner

The movie begins with a play where Prof. Krishnanand is giving a social message against dowry. He is a well aware man and very strong person. He heads the department of sociology in his college. He is living a happy life with his only daughter Pooja and his mother. Radha is a professor of law and colleague of Prof. Krishna and she admires him in his crusade against dowry. Radha's marriage is fixed with Ranvir, who is a lawyer. But on the day of her marriage, Ranvir's father demands dowry which was not accepted by Radha and she cancels the marriage. Radha's father commits suicide after this humiliation. However, Radha got moral support from Prof. Krishna and establish a woman cell which works for dowry victims and succeeds to seek justice for her father and herself.

After this, Pooja's marriage was also fixed with Mohan but Mohan's mother is not happy as she did not get anything as dowry. Mohan and his evil brother-in-law makes various plans and forced Pooja to ask for money from her father, Prof. Krishna. However, on the day of Karwa Chauth the truth is revealed in front of Pooja and also she comes to know that her husband and his family wants to kill Prof. Krishna for his property. In order to save himself Mohan kills Pooja with the help of his family and the news is spread that Pooja 's death was an accident. Prof. Krishna made an unsuccessful attempt to seek justice for his daughter but due to lack of evidences Mohan was released.

Heartbroken and shattered, Prof. Krishna decided to take revenge for his daughter. On the night of Diwali, he records the confession of Mohan and his family. When the truth of Pooja's death is revealed to him, Prof. Krishna kills Mohan and Roshan Lal for what they did to Pooja. In courtroom Prof. Krishna stops Judge Ranvir from passing his judgement and accepts that he killed Mohan and Roshan Lal to avenge his daughter who was brutally killed by them and reveals that the investigating officer was also bribed by them. The judge orders a reopening of Pooja's murder case and the culprits are sent to judicial custody. The judge also accepts that the law needs to be improved in order protect the daughters from being dowry victims. In the climax, Prof. Krishna is arrested and people are shown to be supporting him.

• Yeh Aag Kab Bujhegi at IMDb