Ram (Dhanush), an intermediate student falls in love with a school girl (Shruthi Hasan) studying in other school. She too gets attracted to him. Their love lasts longer for many years and eventually they get married when they become majors. But Ram experiences a weird change in his body and finally gets diagnosed with ‘bipolar disorder’, a psychological disease. He behaves strangely due to that disorder.Finally what sort of decision he takes to make his wife not become prey of his illness? That forms the rest of story.