'Thirunaal' is an action based movie as reported by the movie makers and it is the story of a couple who falls in love with each other. Jiiva played the role of Blade Ganes who was an expert in spitting blades from his mouth on those who attacks him. He is a local village rowdy but falls in love with a homely girl named Vithya who was working as a teacher. After falling in love with Vithya Blade changes his character and knows that crime will not pay. The entire story revolves around this couple in which there is pinch of action, romance and emotional quotient.