Plot

Framed for a crime he didn't commit, Mohan Kumar loses his wife, son, and freedom, then he emerges from prison vowing revenge.

Mohan Kumar's diligence and honesty lands him in trouble with Balwant Singh Kalra, Jugal Kishore Ahuja, and Mr. Bhandari. Together the trio frame and imprison Mohan and make him watch helplessly as his wife is killed. Years later, Mohan Kumar is released from prison, his only goal in life is to avenge his humiliation and wrongful arrest at the hands of the trio. With the help of Dinesh Verma, he establishes himself again, and starts the process of bringing death and destruction to the trio. The trio are well aware of his presence, and decide to send one of their men, Ravi, to spy on him. Ravi falls in love with Verma's daughter, Roma, and decides to change sides to help Verma and Mohan, but Mohan will not have anything to do with Ravi, and asks him to leave. Ravi then becomes a target by the trio and their men, and has to save himself, and the only way he can redeem himself is by turning the tables over Mohan, who is none other than his own father.—rAjOo ([email protected])

Mohan Kumar (Dilip Kumar) is a honest and conscientious man working as the General Manager of a shipping company owned by his friend, Dinesh (Pradeep Kumar). Dinesh is a widower and his daughter, Roma (Amrita Singh) is attached to Mohan Kumar, his wife Sumitra (Saira Banu) and young son Ravi (Rishi Kapoor). Assistant Mgr Jugal Kishore (Pran), Accountant Bhandari (Prem Chopra) and storekeeper Balwant (Amrish Puri) who work under Mohan Kumar, are into smuggling. When Mohan Kumar comes to know of their activities, the three men murder Dinesh and deviously frame Mohan Kumar for it. Mohan Kumar is helpless. Unable to prove his innocence in court (he was holding the gun when the police arrived at Dinesh's house.), he is sentenced to a 14-year jail term. After that Sumitra tries to attack the trio in the street but is thrown off by then and come under a commercial vehicle and dies. Mohan vows revenge against the trio after he returns from jail.

After serving the jail term Mohan Kumar takes help from Puri (Ashok Kumar) whose life he had saved in prison, to take revenge on the three villains. Mohan searches for his son Ravi in orphanages and finds that he ran away several yrs ago. Puri has connections with the under-world. While Mohan Kumar is also unable to trace his son Ravi. Roma lives with her wayward uncle Jagdish (Satyen Kappu), a mean alcoholic.

Unknown to Mohan Kumar, his lost son Ravi (Rishi Kapoor) is a sophisticated conman and steals money by betraying people's trust. Jugal, Bhandari and Balwant still run the smuggling business. Ravi is asked to deliver a few liquor bottles to a party at Bhandari's house. Bhandari is taking a bath, so the servant thinks Ravi is a guest and invites him in. Ravi sits at the table and plays cards, which JK sees and is impressed with his tricks. JK employs Ravi for Rs 10000 per night.

Puri helps Mohan to track down JK as well as Roma. Mohan rescues Roma from Jagdish. Mohan starts by figuring out the Modus Operandi of JK's smuggling operations. He finds out the location where JK's smuggled gold is being offloaded in Bombay, by kidnapping JK's agent Teja (Kulbhushan Kharbanda). Mohan then confronts the trio and tells them that is going after their lives. JK asks Balwant to kill Mohan at the earliest. Balwant finds that Mohan is taking Roma out for dinner on her birthday. As luck would have it, Ravi was scouting the same hotel and sees Roma alone with a purse full of money. Mohan is running late and Ravi strikes a conversation with Roma. Mohan meets Ravi when he arrives & feels an unexplained affection for Ravi.

when Balwant shoots at Mohan, Ravi sees it in time and pushes him away, thus saving Mohan's life. Balwant sees Ravi and reports the matter to JK. JK believes Ravi when he says that he doesn't know Mohan and agrees to be JK's spy in Mohan's house. Ravi pretends to be in love with Roma in order to get close to Mohan. Roma loves Ravi and recommends him to Mohan for a job in Mohan's office. Ravi figures out that Mohan knows the location of JK's warehouses and intends to attack. Ravi tries to warn JK but gets delayed in traffic and then his lift gets stuck. Mohan sets the warehouses on fire. Bhandari had moved all of his life's savings into those warehouses, based on threat from Mohan, that he would target his wealth. Bhandari is penniless now. Bhandari is distraught and jumps into the blazing fire to save his money and dies. Unknown to anyone, Mohan had already removed Bhandari's money bags from the warehouse and delivered them to Puri.

Jugal Kishore and Balwant assign Ravi to kill Mohan Kumar For Rs 10 Lakhs. Ravi decides to kill Mohan at Puri's party that very night. Unable to do so (he hesitates while taking the shot), Ravi falls off the roof, and is ironically saved by Mohan Kumar. Kabir (Mac Mohan), one of Puri's henchmen, finds Ravi's gun. Suspicious, he spies on Ravi and finds out his connection to JK and Balwant. Mohan Kumar is enraged and throws Ravi out even though he begs that he loves Roma and respects Mohan.

Balwant tries to kill Mohan Kumar but fails. Mohan Kumar chases him and hit by a truck, Balwant dies. Ravi runs into Jagdish, who tells Ravi how Mohan was convicted for Dinesh's murder. Ravi confronts Mohan in front of Roma, and Roma is devastated to know that Mohan hid this fact from her. She decides to leave with Ravi.

Meanwhile JK's goon reaches Ravi's house, and they find that Ravi is in fact Mohan's son. JK decides to abduct Ravi. While abducting Ravi, JK finds that Roma is Dinesh's daughter and abducts her too. Now JK informs Mohan that his son and Roma are in his custody and demands Rs 50 Lakhs as ransom.

When Mohan reaches the designated location, Ravi realizes that Mohan is his father (JK reveals the same). Ravi and Mohan team up to get the upper hand on JK, but Teja arrives to swing the equation again in JK's favor. At the end Puri arrives to disarm JK and Teja. After a huge fight, Mohan ends up shooting JK.