Ravi is an well-educated, unemployed guy. His mother (Pratima Devi) is wants her son to get a job. One day Ravi goes to the post office to collect his fathers pension and the postmaster mistakes him for a job candidate. After a joyful conversation, the postmaster offers Ravi a job of a postman and he happily accepts. As a result, Ravi has to go to a village named Sitapur for the job.
There he finds Mohini always waiting for a letter. Eventually, Ravi and Mohini become friends. There is an old woman in the village who has lost her son in the partition and had become insane. Ravi and Mohinis friendship develops and Ravi falls in love with Mohini. A tanga driver Nathu has a strong interest in Ravi and Mohini.
One day Mohini asks Ravi for his measure so that she can knit a sweater. Ravi misunderstands that Mohini is in love with him. Another day, Mohini gets angry with Ravi that he never brings a letter for her. Next day, Ravi writes a letter to Mohini proposing her and hands it to her. Suddenly, Mohini tells him that she had been waiting for this letter as it belongs to her husband.
Ravi is heartbroken. In the flashback, it is shown that Mohini loves a soldier also named Ravi. He has promised Mohini that he will return from the war but had not returned. Ravi hands her the letter and returns to his home. Ravi also sets out to search for that guy but gets no clue.
After that, Ravi goes to his mother where his mother asks him not to lie to anyone in the village. When he returns the old woman asks him to read a letter which has a news of her sons death. Ravi speaks the truth.On the same day, he receives a telegram saying that the soldier is dead. He goes to inform Mohini but learns that the old lady is dead because he spoke the truth.
Ravi returns without saying a word. Meanwhile, Mohini is very happy. Ravi goes to Mohinis house but cant dare to speak. At night, Mohini comes to Ravi and asks him why he came today. Ravi tells her the truth and next morning she tries to commit suicide.
Afraid of Mohini her mother asks Ravi to accompany them to Khetpur where she is going for Mohinis marriage.In the journey Ravi tells Mohini that he loved her and because of this he cant tell her the truth of her lovers death. Mohini feels very upset. Ravi accompanies them to Khetpur. Just when he was leaving Mohini gets hit on the stairs and falls on the ground.
Ravi runs to save her. Suddenly, Ravis mother steps out. Ravi and his mother stare each other in astonishment. Ravis mother tells him that she has come to fix his marriage with Mohini. Ravi and Mohini are filled with joy and the film ends.
Rajesh Khanna, Hema Malini, Asrani, Farida Jalal
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