A couple who get separated due to the cauvery riots of 1991, strive to find each other after 12 years of being apart from each other.

Balu and Charu love each other but Balu's uncle's daughter, Ria, gets pregnant with her classmate's child. Being devoted to his uncle, Balu decides to take the blame and marry Ria.

Ravi, the only son of Vedachalam (Baliah), has traveled on business. Returning home, he meets a young woman on the train after picking up her spilled luggage. The contents of the luggage reveal that she is his sister, from his father's teenage years. When he returns home, she is moved in and living a life of wealthy luxury. But is she really who she says she is?