A man who is separated from his family as a child is replaced by an interloper.

A contract worker in Sudan is abducted by mercenaries and his lover in India awaits his return.

The movie starts in 1970s, where there is heavy drought in southern districts of Tamil Nadu. Ayyadurai (Sarath Kumar) and Maadasaamy (Napoleon) are close friends and landlords of different castes in Tenkasi town in Tirunelveli district, and they try hard to help people and save them from dying during the drought. Local MLA (OAK Sundar), also a relative of Madasami, smuggles rice given by the government and people protest, knowing about this. The MLA denies knowing anything about the sanctioned rice. That night, he starts to smuggle the rice, but the lorries are waylaid and ransacked by the people led by Madasamy. The MLA comes there and starts shooting towards people’s legs. Ayyadurai sees the MLA aiming for Madasamy’s head and pushes him. Then Ayyadurai beats the MLA using hilt of the gun, following which he dies. But the local people support Ayyadurai and save him from police and also urge him to contest in the assembly by-elections.

Very much concerned about his family’s financial status, Arivudainambi is unhappy with the way his sister’s wedding to a wealthy man is being done.

Shiva and Vishnu (both played by Ajith Kumar) are identical twins. Shiva, the elder one, is a bus conductor, while Vishnu, the younger one, has a mild intellectual disability. Shiva overhears his parents’ plot to kill Vishnu. He runs away to another city with Vishnu and strives hard to look after him. A ‘dada’ Sundaramoorthy (FEFSI Vijayan), who runs a beggar trade, beats Vishnu brutally, and Vishnu becomes handicapped for life. Shiva leaves Vishnu in a home run by a social worker Lalitha (Sujatha). During the day, Shiva works as a bus conductor, and at the same time, poses as Vishnu: to play Robin Hood and steal from the rich and corrupt. A gang including Thangam (Meena), Ramesh Khanna, and others assist him in these operations. He is never suspected, and so, with the stolen money, he takes care of not only Vishnu, but also 800 people in other institutions for the physically handicapped. A college student Lavanya (Kiran Rathod) falls in love with Shiva, but he later comes to know she is Sundaramoorthy’s sister-in-law. Matters worsen when Sundaramoorthy becomes the chairman of the institute for the physically disabled. How Shiva deals with the situation forms the rest of the story. Meanwhile, Thangam is in love with Shiva, though he does not know this. Later she gives up her love and lets Lavanya marry Shiva. At last, Shiva marries Lavanya and Thangam marries Vishnu.

Sivaji Rao, a Hyderabad based officer is posted in Mumbai to handle a corrupted cop called Pansari. He successfully manages to arrest Pansari but he soon makes bail and makes it his mission to make Sivaji pay for sending him to jail.

Saroja is born in a very poor family and is raised by her mother. However, in order to raise her children, Saroja’s mother resorts to prostitution.

A couple (Suhasini and Sathyaraj) who lost their daughter in an accident decides to adopt a girl from the local orphanage. But problems arise when the child’s real mother (Rekha) and father (Raghuvaran) seek to find her.

Four friends, who are unemployed, are in desperate need of money. When one of them, Azhagu, decides to kidnap his niece for ransom, they land in deep trouble.

Ray Garrison, a slain soldier, is re-animated with superpowers.

An unhappily married aristocrat begins a torrid affair with the gamekeeper on her husband’s country estate.

A bus named Anbu narrates the stories of its 24 passengers, giving a glimpse of their journey from Kodaikanal to Dindigul.