Kamarasu (Murali) hails from a village and is employed as a driver with an industrialist Latha (Srividya), who treats Kamarasu as her own son. Kamarasu is very affectionate towards his widowed mother (Vennira Aadai Nirmala) and takes care of her. Kamarasu falls in love with Vasanthi (Laila), who also hails from his village. Kamarasu is kind towards everyone and earns the love of the villagers. Unfortunately, Kamarasu's mother passes away, which shatters Kamarasu. However, he comes back to normal with the help of Vasanthi's love and affection. A few days later, Vasanthi also passes away due to a lightning strike, which makes Kamarasu worry a lot. Kamarasu decides to spend the rest of his life serving the needy people as he has lost both his mother and lover. Latha takes care of Kamarasu, and he sees her as his mother. One day, Latha and her daughters meet with an accident and are admitted in a hospital with multiple organ failure. The doctor (Chandrasekhar) informs Kamarasu that Latha needs a heart transplant immediately, while her daughters need other organ transplants such as liver, eyes, etc. Kamarasu requests the doctor to take his organs, thereby saving Latha and her daughters, for which the doctor does not agree. Kamarasu kills himself by jumping out of the window so that his organs can be donated to Latha and her daughters. The doctor performs the transplantations, which saves Latha and her daughters. Knowing this, Latha feels sad but at the same time proud about Kamarasu's sacrifice. The movie ends with a message about organ donations.