Plot

A man and his friend commit petty thefts to make a living. After they break into a woman's house one day, one man's life changes forever.

Raja and Balu are petty thieves. One day they take up the job of stealing an idol of Lord Ganesha from a temple. While escaping from the chasing people, they hide in a house, where Anjali, who is a governess takes care of three children when the other family members were away on a tour. She locks the two of them in the kitchen room for one week. Anjali, while spending time with the guys, realize that they are not bad after all and develops a soft corner for Raja. They will be released on the day the family members return from the trip. Raja falls for Anjali, he tries to change his ways by working responsibly and also makes a habit of writing a diary as per her advice.

Before leaving the house, Balu steals Anjali's bag which contains her diary, and Raja reads the diary. Anjali is the illegitimate daughter of lawyer Viswanatham. After her mother's death, Anjali meets her father who accepts her as his daughter but has to bring her into his house as a maid. Viswanatham and his wife Bhagyam, her sister Jaya, her sister's husband Shankaram, and their three children live in the same house. Bhagyam's brother, Sanjay comes from Canada, Anjali likes Sanjay and Viswanatham wants to get them married, but Sanjay says, he needs at least three months to decide. After reading this, Raja decides not to express his love and hides his feelings for her.

After returning from the trip, Bhagyam finds out a diamond necklace is missing. When looking for it, she finds a cigarette bud in one of the drawers. She discovers that two thieves had stayed in the house and blames her for the theft and expels her. When Raja and Balu go to return the diary, find out and accommodate her in a hostel. Raja does many petty works to pay the hostel fees and help Anjali pursue singing after finding out her singing talent. He asks music director K. Chakravarthy to give her chance to sing. Anjali after singing a few songs becomes successful in her singing career and becomes rich. She stays in a bungalow with Raja and Balu.

Meanwhile, Viswanatham reveals the truth to his family, they all also accept Anjali and everyone comes to stay with Anjali. Even Sanjay also returns from Canada to marry Anjali, Sanjay and Raja becomes good friends, but Bhagyam and the gang starts to look down Raja and insults him a lot. Once when Anjali goes on a foreign tour, they blame the theft on Raja and throw him and Balu out of the house. Anjali returns from the tour, but she does not believe that Raja is a thief and she finds his diary which he forgot and understands how much love Raja has hidden in his heart for her.

At the same time, Anjali wins a National Award and her family members are making the wedding arrangements of Sanjay and Anjali. Her state fans association arranges a felicitation ceremony for Anjali, to which Raja and Balu attend the function by standing in the crowd, but Anjali sees him, she acknowledges her entire success at his feet and decides to marry him. In a flashback, it is shown that Anjali had informed her father about her love for Raja and how Sanjay had accepted it. Finally, the movie ends with Raja and Anjali leaving the function hand in hand.