Aadhi and Shivani are children of single-parents who want to enjoy the happiness of a complete family. In order to achieve this, they try to unite their parents but end up in trouble.

Three friends, who value friendship over everything else, begin to fall apart when one of them learns about a shocking incident that happened in their past.

The movie starts off with a robbery of 20 crores in Pondicherry IDID Bank where a college girl is killed by one of the thieves. The same night as the robbery, the manager of the bank (Manivannan) commits suicide. After this the story opens up in Chennai where Shiva Sundaram (Prasanna) a visible foolish person comes in search of David Raj(Manoj K. Jayan) where he saves a girl from being raped by one of David Raj’s men. Then he confronts David and says that he came to get the stuff a.k.a. heroin from him saying that Moorthy told him to get it for Rs.10000/= and wants to sell it to Rs.20000/=.But David Raj understanding that he is a fool sends in 1 crore worth heroin without the knowledge of Shiva saying that there will be a call to the phone he gives and tells him to deliver it to the address the caller says and to be caught by the police with the buyer.But Shiva goes the wrong way and goes to see his friend Vellai (Karunas) where Vellai has taken money from a lender for interest to give to Shiva.At his place they open up the package and they both think it is toothpaste powder.Where Shiva says that he must get a call. Then with the money lending party they go to said place and the two people of the money lending party goes to the buyer and get the money but they are caught by the police. Then next day Shiva calls the T.V station where Priya works where he reveals that he is the brother of Ram Mohan (Abbas) and that Moorthy must call him else he would die jumping from the top of a building. Then the police arrive at the building to find that Moorthy has called him.From there knowing that Priya is a friend of Mohan he gets into her house saying that he is Ram Mohan’s brother.But after certain events Ram Mohan returns to India and finds his brother burning in a flat. After this Sundhara Moorthy surfaces and spills the beans about Ram Mohan to the family of Priya that her father the manager of IDID Bank was murdered by Ram Mohan and his brother because he found out that his bank was robbed by the two brothers and the college girl who was killed in that incident is his sister. From here onwards a fight happens between Sundara Moorthy and Ram Mohan where Sundara Moorthy wins.

The film opens with a flashback showing the family feud between families of Prabhakaran (Vijayakanth) and Bhavani (Indraja). Prabhakaran and Bhavani are in love. The murder of Bhavani’s father, is wrongly accused on SP’s father. He starts to help Bhavani’s family and mortgages his own house to finance her factory with the intention of making it up to them as he still believes that it’s his father who killed Bhavani’s father. But Bhavani is now trying to take revenge for her father’s murder. SP’s mother is now on her deathbed. While in the hospital, his mom tells how his father had a different wife and he should ask them forgiveness. He storms into Bhavani’s house and accuses her uncle (who really killed Bhavni’s dad), also trying to make her understand the truth but she doesn’t believe him. Then Prabhakaran says he doesn’t love her any more and vows that he will never trust a woman by remaining a chronic bachelor forever.

Aravindan (Vijay), Chandru (Suriya), and Krishnamurthy (Ramesh Khanna) value friendship over everything else, even family. For this reason, Chandru resists the advances of Aravindan’s sister Amutha (Vijayalakshmi). When the trio takes up a painter’s job at a mansion, Aravindan falls in love with Padmini (Devayani), who lives there. Padmini’s jealous cousin Abhirami (Abhinayashree) makes him believe that his overtures are reciprocated. When the truth is revealed and Padmini rejects him, Chandru stands up for his friend and speaks ill of her. This makes her swear to separate the friends.[2] After the marriage, Aravindan realises the hand of Abhirami behind all the mishaps, and Padmini realises that Chandru is innocent. Chandru and Amutha’s marriage is arranged. Gautham (Sriman) is Aravindan’s cousin who is in love with Amutha and wants to separate the pair. He makes Chandru believe that Padmini is trying to kill Amutha. Padmini is angry with Chandru. Aravindan tells the truth that in their young ages, he unknowingly killed Chandru’s deaf and mute brother. Gautham records this and makes Chandru hear it. Chandru and Aravindan fight and go by their ways. Aravindan tries to convince Chandru but falls from the top of a mountain. Chandru believes that Aravindan is dead, but after five years, he finds out that Aravindan is not dead but has ended up in a coma. Gautham is now torturing his family a lot. When he comes to know that Chandru has come back, he starts to beat him up. After hearing Chandru’s cry of pain, Aravindan wakes up from his coma. He beats up Gautham, and everyone rejoins and lives happily.

Meera starts calling bhoomi, her bodyguard just to fool him by telling him she loves him. Problems arise when bhoomi falls in love with her not knowing who she is.