In a Year with 13 Moons

The mistake of two infants on a night of bombing during World War II plunged their families into grief and conflict 18 years later, when both girls were marriageable.

Olga, a French girl of good social position, marries Ali Benvert Bey, an Arab, against the advice of her friends, including Dr. Alex Werner, medical man to the Bey. Olga sails with her husband to Arabia, where for a time, she is extremely happy. She soon finds that she is expected to conform to Arab customs. Her husband objects to her meeting European friends and will not even allow her to see Dr. Werner without his permission. When the Bey learns that his wife and Werner have met secretly, he carries her off to a dancing hall where he tells her that she will remain imprisoned. She is rescued and carried away by Werner, the Bey follows in pursuit and is shot dead. Olga is taken back to Europe to presumed happiness.

Karthik (Rathan Trivikrama) lives with his widower father Ramachandramoorthy (Kota Srinivasa Rao) who spoils him since the death of his mother. Anitha (Manju) is his neighbour who lives with her parents and little sister in the neighbouring house in the same apartments. Karthik and Anitha are childhood friends and even study at the same college, and their fathers Ramachandramoorthy and Krishnamoorthy (Rajan P. Dev) are like brothers. However, Karthik and Anitha are constantly squabbling like children and playing pranks on each other. But one day, a prank went wrong and Karthik gets suspended from college thus he starts hating Anitha. Thereafter, Anitha's wedding is fixed with the wealthy engineer Gowri Shankar (Abhinay) and Ramachandramoorthy was the one who made both families agree. It was only then that Anitha realises her love for Karthik. Anitha then briefs Karthik about her wedding and expected him to declare his love for her, Karthik, for its part, manifested his happiness making fun of her. Karthik then realises his love for Anitha and tries to apologise to her but she keeps ignoring him. He even wrote "Karthik loves Anitha" on a ten rupee note that she had gifted him once for his birthday. When his father finds the currency note one night, he felt guilty at not being able to understand his son's feelings and the next morning, Karthik finds his father dead with the note in his hand. Anitha's family asks Karthik, who was consumed and distressed by the death of his father, to move in with them for a few days. At her home, he is still unable to express his love. Karthik finds a job in Bangalore and has to leave them just a few days before Anitha's wedding, thus he will miss Anitha's marriage. After he left, Anitha finds the currency note and starts to tear up. After thinking for a while, Krishnamoorthy cancels the wedding for the good of his daughter and wants Karthik to be his son-in-law. The film ends with Karthik and Anitha romancing via mobile phones and they are looking forward to their wedding.