Vetri (Ashok Selvan) studies a criminology course and possesses great observation skills, and this makes his professor, Govardhan (Rajan Iyer) to insist him taking up a detective job. Vetri gets a job in a private detective agency and leaves to Chennai to meet Govardhan and receive his blessings. He joins the detective agency and his bosses are Sadagoppan (Pradeep Nair) and Sailesh (Jayakumar). Vetri stays with his close friend Nambi (Kaali Venkat).