An orphan boy enters a chemistry laboratory and drinks a chemical which made him invisible for a limited time. The plot forms when he takes revenge on those people who harassed him and his friends of the orphanage by becoming invisible.
Mukesh tries tricking both his in-laws and his boss (Vijayraghavan) - with the help of Srinivasan - to go from being a pun to becoming manager of the company he works for, in order to marry Ratha (Vani Viswanathan).