Balu, after completing his engineering goes to live with his friend Karthik in Chidambaram. Whilst there he meets Hema, Karthik's sister and soon they fall in love. All goes well for Karthik until he gets involved in a tiff with Kasi, a local gangster and beats him up. Enraged and furious, Kasi swears revenge and plans to kill Balu and his family. How Balu saves his family, forms the crux.