Mystic Smile) is a 2010 Indian Tamil-language romantic psychological thriller film written and directed by Karu Pazhaniappan, starring himself, along with Meenakshi, Santhanam, Rishi, and Thambi Ramaiah.

The film tells the story of an architect Kathir (Karu Pazhaniappan), who is talented but also forthright in his dealings.

In the end, Nandhini claimed that she planned things to make him reform, but Kathir says he celebrates people dying.

[citation needed] The Hindu wrote "Mandhira Punnagai, whose powerful subject and fairly interesting treatment deserve a wide reach, would have got it very easily if Pazhaniappan had gone in for a popular face for the role.

"[1] The New Indian Express wrote "It's commendable that Palaniappan had taken on a challenging and an unusual theme in his first film as an actor.