'Idhayakkani' is the story of the kind-hearted Mohan (MGR) whose principle of life is 'equality' and who places it in apply by sharing equally the earnings of his property along with his labourers. He has one other ardour - he desires to serve the nation - and for that, he has joined the police drive as an officer. He meets a needy lady, Lakshmi, and on the recommendation of and aged home assist, he permits her to remain in his home. Tongues begin wagging and Mohan decides to marry the lady. Nonetheless, his happiness is short-lived. He will get the shock of his life when he involves know that his spouse is concerned within the homicide of a number one scientist. What's the fact? Did Lakshmi homicide the scientist or is she harmless. In that case, then who's the perpetrator? How does Mohan go about discovering the reality?
