Karu Pazhaniyappan, who has made reasonably thought-provoking films like "Parthiban Kanavu" and "Pirivom Sandhippom", turns hero with "Mandhira Punnagai". After exploring human relationships in his first two directorial ventures, Palaniyappan attempts to look into human lives psychologically.

A thug's plan to sell off his mansion to repay his debt faces opposition from his rival. With the help of a policeman, he approaches a wealthy man with a criminal past.

Pandian, the son of a cop and a wannabe rowdy, falls in love with Kadambarai, a hearing-impaired girl, who wants him to take on Killivalavan, a gangster-politician who has murdered her parents.