The story begins as Maalathi, a woman who is a mother of a son and a daughter is expecting her third child. However, Malathi is told by her husband Senaka, that her newborn child had died at the moment she was born. The child was a girl and she was to be given the name Nilesha. The film proceeds with the family moving to a new house in an apartment and the two kids do childish things to enjoy themselves with the kids in the apartment. Meanwhile, they get to know there is an ex-convict called Bandu in the apartment. They get curious about this so one day they even sneak into his house. They also make fun of a child with a mental disorder who is living in the apartment. There is a sub-plot where Mr. Abeypala's son has a crush with Mr.Silva's daughter and the kids make fun of the two elders. The two elders seem to be against each other.
5 Years Later
Malathi discovers that her husband spends money for some reason she is not aware of. Senaka reveals that the third child, is still alive. The money was spent to pay the monthly fee to a nurse Laalani, dedicated to take care of her. The doctor of the hospital explains the whole story to Malathi, stating that they still cannot assure that Nilesha will live for a long time. The couple bring their child home. Nilesha's brain has not developed parallel to her age. It is not an easy task for the child to get friendly specially with her sister. However, she starts to get fond of both her brother and sister. Her brother saves her from being insulted by the other kids. It appears that Nilesha finds it hard to interact with Malathi and to accept her as her mother because of her low-intelligence. One day Senaka saw Kalau Ranji a criminal, with two others insulting a man on his way to home. The criminals use a van which looks like an ambulance. He gives a verbal statement to the police officers. Later on, the criminals come to his workplace and threaten him to withdraw his statement or else his two kids will be kidnapped, presumably. Meanwhile, Malathi finds Nilesha playing with Bandu and takes her away from him. The child with a mental disorder is kidnapped by the criminals using the same van which they used earlier. The kids run after them but in vain. In a sub-plot, there is a meeting between the residents in the apartment and the chairperson tells Senaka and Malathi that the other residents are complaining about Nilesha. At this moment, Bandu comes forward and convinces the gathering that everyone in the apartment has faults and it is not sensible to tell the family to leave. Meanwhile, Nilesha is hospitalized again due to sudden unconsciousness. Bandu fights with Kalu Ranji and his associates who try to attack Senaka. At the end of the film Nilesha gets unconscious again but recovers and tells his mother “Amma.” The lady doctor of Nilesha has a telephone conversation with Senaka and she assures that Nilesha's heart problem can be treated successfully.
