This Tamil remake of “9 to 5” has three women working in the same office (Revathi, Rohini, Urvashi) who are constantly harassed by their lecherous boss (Nasser). The three decide to gang up against him, but the situation gets complicated when the boss lands in a hospital and the three women end up with the dead body of a terrorist.

Ramalingam (Kamal Haasan) & Sundaralingam (Prabhu Deva) are simpletons who are always in search of ways to earn a quick buck. Sundaralingam is an artist with good talent, while Ramalingam is the business brain who brings in money, mostly by fraudulent means. They fall in love — Sundaralingam with Janaki (Rambha) and Ramalingam with Sundari (Soundarya). Both are students of art.
Janaki’s father Paramasivam (M. S. Viswanathan) rejects Sundaralingam. Sundari convinces Janaki to write letters falsifying Sundaralingam’s rise to fame and big money, eventually lying that Janaki & Sundaralingam now have a son, in order to win over the parents with sentiment. Janaki’s dad, worried that his grandson might be brought up poorly, arrives at a mansion that has been set up to look like Sundaralingam’s new property, along with her mom Parbathy (Srividya). Meanwhile, Sundari’s dad Balamurugan (Moulee) also makes an unexpected stop there to check on his daughter.

Three amateur thieves plot to kidnap the young son of wealthy Chettiar (Santhana Bharathi) from school. They do a trial run. However, on the eve of the kidnap, the guy whose job is to operate a crane in this plan is hospitalized. The services of Avinasi a.k.a. Mumbai Xpress (Kamal Haasan), brother of Kovai Sarala, a deaf stuntman performing daredevil bike acts, is roped in. Twists and turns take place where the other two gang members are hurt, and invariably, our Mumbai Xpress is left to perform the task all by himself. He kidnaps a wrong boy Daddu (Hardhik), the illegitimate son of Ahalya (Manisha Koirala) and police officer Rao (Nassar), but manages to get a huge ransom from Chettiar by default. A brawl takes place between the original kidnap planners – Chidambaram (Pasupathy), Johnson (Vaiyapuri), and Avinasi – in handling Ahalya’s child, but Avinasi delivers the child unhurt to his mother.

Venugopal, a wealthy industrialist, marries a woman named Sushila and they have quadruplets. His brother Nandagopal tries to have her and the newborns killed by hired goons. However, the leader of the goons has no desire to kill the babies, so he adopts one (Michael), leaves one in an orphanage (Raju), one in a temple (Kameshwaran) who is picked by Palakkad Mani Iyer, a Brahmin, and one (Madhan) in a car that belongs to Venugopal.
30 years later, Madhan is now a London-educated businessman. Venugopal has raised Madhan as his adopted son, not knowing that he is his biological son. Venugopal is killed by Nandagopal and his nephew, Ramu for his inheritance, but unknown to them, the will has already named Madhan as the beneficiary.