Madhavan is trying to get a job for his unemployed friend Sethu. When a spate of robberies takes place in a middle-class neighbourhood, Madhavan has Sethu pose as Ram Singh, a Nepali émigré, to fulfil the residents' need for a Gorkha security guard. He befriends Nirmala, a preschool teacher. Meanwhile, a police officer and his daughter, Maya, move into the neighbourhood, bringing back memories from the past for Sethu.
Three years before, Sethu and Maya were friends and later they fell in love with each other. But, they separated due to some misunderstandings. Sethu apologies to Maya, but Maya does not reciprocate. Nirmala also finds the real identity of Sethu and his relationship with Maya. Tomy, a neighbour, misbehaves with Maya and Sethu beats him.
The colony's residents turns against Ram Singh after the incident and suspects that Nirmala has an affair with him. Nirmala's husband Balachandran returns from Dubai and the colony's residents gossip about the relationship between Sethu and Nirmala. Balachandran says that he trusts his wife and that his wife has send letters about Sethu. Balachandran visit Maya's father and learns that she is actually a widow. Balachandran has also arranged a job for Sethu abroad and when he is returning he will also take Sethu to Dubai. The movie ends with Maya and Sethu uniting.
Cast
Mohanlal as Sethu, a security guard and story protagonist / Ram Singh
