This story is about three good-hearted men – Shiva (Sivaji Ganesan), Muthu (Muthuraman) and Nagu (Nagesh) – who become criminals due to unavoidable circumstances. The trio escapes from Central Jail and lands up at Pashupati’s place. Pashupati is a small-time trader. Initially, the three of them intend to loot the money and jewellery from Pashupati’s locker, but as time passes, Pasupathi and his family members’ love and affection towards them changes their heart and the trio becomes part of the family. They start helping Pashupati in all his problems, but constantly fear of being identified and arrested. Will Pashupati and his family ever come to know their true identity? How long will they be able to hide themselves from the police?
Vetriselvan (Sathyaraj) is an established and old-fashioned music director who is loved and respected for his works and is termed as the greatest musician of our times. A. K. Shiva (S. J. Surya), who works as an assistant under Vetriselvan, gets an opportunity to compose music for a small-time film. When he seeks permission from Vetriselvan to go ahead with his first venture as a music director, Vetriselvan does not oppose the idea as he would not have imagined even in his wildest dream that one day, Shiva would surpass him in the musical world. When Shiva introduces new techniques and pioneers the use of synthesizers, his music gets the attention of all music lovers. Due to the freshness and modernity his music possesses, he becomes the most sought after musician and overtakes Vetriselvan. Shiva becomes the number one musician and builds his own studio. Meanwhile, he falls in love with Jenny (Sulagna Panigrahi) and marries her. When it seems everything he touches turns to gold, Vetriselvan displays his psychopathic form. To get his glory back, Vetriselvan does whatever it takes to label Shiva unfit to compose music. Can Shiva bounce back despite his new and unwanted status forms the rest of the story.
At a remote Dhaba in Atikapamala, 20 km from Suryapet, Vijayawada, a young boy named Nandu pulls out a gun and kills the local don, Vanka Suri. Fleeing to Old City, Hyderabad, Nandu is spotted by Sadhu (Rahul Dev), a local don who is impressed with Nandu and takes him under his wing. Sadhu and his gang plan to rob the local bank with the help of Nandu and a few other kids. The heist goes off smoothly, but Sadhu is betrayed to the police by one of his lieutenants, Narsing. At the local police station, the police beat up Sadhu, while the corrupt SI and Narsing divide the money between themselves. Nandu creates a distraction by causing a short circuit and escapes with Sadhu and another kid, Malli. Sadhu tells the two of them to run away and leave him, since the SI might find and kill them. Nandu calmly replies that he won’t, because he has already killed the SI.
The film is based on the philosophy that dreams will be fulfilled, presenting Jai as having a fetish for writing a diary, while changing things that go wrong in his life to have a happy ending. He comes across a pretty girl, played by Shazahn Padamsee, who he is intimidated by and cannot build up the courage to tell her his feelings. Meanwhile, Vijay Vasanth also takes a liking to her and uses a different method to convey his feelings. Whom the girl falls for forms the crux of the story.
The film follows lead actor Kamal Hassan who plays a singer and his band on a tour to Singapore. Over there Kamal meets his love interest (played by Jayaprada). Kamal immediately is attracted and begin to spend more time with her. He also notices that something peculiar and fishy surrounds her life. Meanwhile, Rajnikanth receives a tape containing a love message for him from one of his fans who doesn’t reveal her identity. Rajnikanth is in search for her and eventually locate her only to find that she is mentally unstable and often sends these type of messages to famous celebrity. Kamal on the other hand learns that Jayaprada suffers from cancer and is counting her days. Jayaprada profess to Kamal that she wants to perform on stage with his troop in her final days. The film ends on a tragic note with Jayaprada demise.
Priya Amal Raj (Kajol) lost her mother at a very young age. She is friendly, outspoken, sensitive, yet precocious. Priya is brought up by her dad, Amal Raj (Girish Karnad) who is a clothing industrialist. Since her childhood, Priya is interested in singing, music, and church.
Thomas Thanga Durai (Arvind Swamy), a polite, well mannered NRI businessman, returns to India from America to look after his father’s James Thanga Durai’s (S. P. Balasubrahmanyam) business. James is a former associate in Amal Raj’s business and now establishes his own business empire in the same vicinity, opposite Amal Raj’s factory. He boasts of his son’s achievements. However, Amal Raj dislikes James’ ill-mannered, clumsy and bizarre antics though Thomas and Priya have known each other in their childhood.
Suryaprakash (S. J. Suryah) is a businessman who wants to become richer than Bill Gates, and in the process, he loses out on family and social life. So he tells scientist Stephen Raj (Nassar) to make a clone of him so that he can keep concentrating on business and the clone can take his place at home. Savithri (Tamannaah) is a college girl who does a research project on Suryaprakash and begins to love him. Suryaprakash is not interested in Savitri, but he marries her to make use of her cooking talent in order to widen his business. After singing and dancing with both models Namitha (Namitha) and Malavika, and humiliating his brother-in-law ‘Digil’ Paandi (Vadivelu), Suryaprakash finally understands the value of family after his mother (Seetha) dies.
Thavathiru Sivadas Swamigal (Nassar) runs a drama troupe in which Thalaivankottai Kaliappa Bhagavathar (Siddharth) and Melachivilberi Gomathi Nayagam Pillai(Prithviraj) are his direct disciples. Gomathi is left by his father in the troupe of Swami. Kali is found by Swami during a train trip where the boy is singing and begging alms. Impressed by his singing talents, Swami takes the boy with him. Gomathi and Kaliappa have relationship like brothers. They grow up together and stage many plays where Gomathi often plays “Sthripart” – the female role and Kali plays “sidepart”- supporting characters. While Vadivambal (Vedhicka) joins as the female member in the group, soon falls in love with Kali, while Gomathi falls for Vadivu, however, Kali loves Rangamma (Anaika Soti), the princess of the zameen. Bhairava (Ponvannan) who is another student of Swami is a popular “Rajapart” – performing main title characters of a stage play. He becomes headstrong over his acting capabilities and does not attend the rehearsals for which he gets scoldings from Swami. After a quarrel, he leaves the troupe as he could not bear the torture of Swami. Swami does not give up and conducts an audition for the main character role of Soorapadman in which Kali and Gomathi perform. Kali gets selected, which leaves Gomathi angry. The reason behind Swami’s bias towards Kali is never answered clearly to Gomathi which leaves him more frustrated.