Karuthamuthu is the story of a pure heart striving for love and respect in a world of stone-hearted fair-skins. Karthika’s father, the one to have caressed her and taken efforts to design her future bright, had died at her early age living only his skin color as heritage to her. As dark containing clouds covering the clear blue sky, her truthful and sincere inner self is blanketed by her inky skin.