Gopi(Kamalhassan) is an unemployed BSc graduate. Though his uncle's daughter Jayanthi(Sulakshana) tries to enter his heart, he falls in love with Padmini(Radha) the daughter of a rich businessman. When Padmini is on a visit to her father's friend's estate, she spots Vinod(Kamalhassan), a look-alike of Gopi. She learns that the manager of the estate Rajalingam(Vinu Chakravarthy) has made Vinod a drug addict and is swindling him of his riches. When Gopi learns from his mother that Vinod is none other than his brother who was separated at birth, he takes Vinod's place to set things right while Vinod is smuggled to his house.

The movie offers everything that goes towards making a light entertainer. Kamal is the perfect romantic hero as he resists Sulakshana's advances while at the same time making his own advances towards Radha. Surprisingly, his encounters with Sulakshana that are more entertaining since they are done with a comic touch. Her arguments to belittle the height difference between them and the way she turns the tables on Kamal after being caught are cute and funny.

Ofcourse these romantic acts are just fillers and the movie shows some semblance of a story only after the second Kamal makes an appearance. With the drug addiction and wealth and girls, he is naturally the more interesting of the two. The surprise at their similar looks is quicky disposed off with the oldest trick in the book and the movie shifts to them operating under new environments. Here again, it is the drug addict in his mother's house who raises more interest. His struggle to fit in is fun as he deals with his sister and Sulakshana. Though Gopi has a more potentially interesting situation with the villains, his execution of his plan is neither clever nor interesting.

As in all masala movies, stunts and song sequences occupy a substantial portion of the movie here too but this isn't a problem since they are well-done. The fight at the teastall is beautifully choreographed with Kamal's handling of the bench being superb. The other fights aren't as innovative but are choreographed well. The climax chase is extravagant but not very thrilling. Naanaaga Naanillai... is the pick of Ilaiyaraja's songs and is very melodious. Vaanam Keezhe... is well-picturised with S.P.Muthuraman's trademark shining lights and glitzy costumes. Varudhu Varudhu... is a showcase for Kamal's dance moves(though they do seem a little slow now).

Kamal distinguishes beautifully between the two roles with his accent and gestures adding gloss to the role of the foreign returned man. Many of the English phrases he uses seem quite ahead of their time. Sulakshana is energetic, especially in the Summaa Nikkaadheenga... song sequence while Radha doesn't have much to do. Vinu Chakravarthy, Koundamani and Janakaraj make up the bad guys but, they are not really impressive since they do double duty as comedians too.