Three cousins and their best friend leave for a road trip, hoping for one final hurrah before one of them gets married. Their path crosses with that of two girls who are on a getaway of their own. Their plans are derailed after a suspicious death. Who was the killer and why forms the plot.
Riny (Biju Menon) is the right hand man of jeweller Lolappan (Innocent). He is extremely selfish and doesn't worry about the consequences of his actions as long as it contributes to his growth. He becomes estranged even with his family, but despite this, his rise up through the ranks continue.
Vasoottan an auto driver by profession, who is very good at heart and meanwhile he is an impetuous person. Once a MBA student happens to travel his auto with some hidden purposes.
Goutham is a young businessman who lives with his mother and grandmother. Goutham's mother Vasundara Devi is the head of their family business. Vasundara Devi is a strict mother; but grand motheris extremely friendly with Goutham. Apporva is Goutham's best pal. Then enters Nithya, a sand animation artist. Goutham meets Nithya and after a series of incidents, the couple falls in love. But Nithya, who has a memory loss problem due to a major accident,can't remember anything more than a day. This problem creates obstacles in Goutham and Nithya's relationship and this forms the crux of the story.
Madhavan Mahadevan, who comes into the city from a village to see off his sister-in-law and her daughter after the death of his elder brother, an upright Customs Officer (KB Ganesh Kumar). While running around to claim the insurance money, he comes to know that his brother was actually murdered by the underworld don Irumbanakkal John (Joy Mathew).
Kannan (Dileep) is the son of a fashion weaver Ayyapanashan (Babu Namboothiri). His father has sent him for fashion designing,but Kannan wants to make more money easier. His friends are Yesudas a.k.a Yesu (Lal),a goonda and Vasu (Kalabhavan Shajon).
Two young men Mammad (Babu Antony) and Circle Inspector Jayachandran (Riaz Khan) team up in their war against an underground mafia and smuggling ring while also avenging the deaths of their loved ones.
ellaichaamy (Vijayakanth) thinks the world of his three brothers, even giving up marriage when he learns that the woman he loves plans to send them to a hostel after the wedding. The brothers live with their grandmother (S. N. Lakshmi). He works hard to raise them and they too reciprocate his love and affection. The eldest of the three, Muthu (Vijayakanth again), is a cook in a small hotel, When Vellachamy learns that Muthu is in love with his childhood playmate (Meena) he goes to the city to his friend (Rajiv) with the marriage proposal. Only to be insulted! Circumstances bring Muthu to the city, to the girl's palatial bungalow where he works as a cook. The girl is arrogant and rude till she realises that Muthu is her childhood pal. And now it is she who does all the wooing and persuades her father to get her married to Muthu.
Diwakaran (Jagadish), a medical sales rep, is also a thief, unbeknown to everyone but his pal Chaandy (Kalabhavan Mani). Mistaking retired school teacher Aravindakshan (Premachandran) for a politician, Diwakaran steals jewelry from him, which Aravindakshan had intended for his daughter's marriage. The cop investigating the case, Jayashankar (Vijayaraghavan), becomes Diwakaran's brother-in-law, to the latter's shock. Jayashankar then brings a proposal for Diwakaran - Aravindakshan's daughter!
The movie shows a true to life story related to a common run Indian family, where the esteem of a family is held in high regard. The story is an exemplary portrayal of the liabilities of a responsible father, obligations of a dutiful son, role of a virtuous wife and harmony in the family unified by psychological bonds.
Ranganayak, a rich women, has three sons : Gopi, Madhu and Balu. Ranganayaki wants absolutely a grandson and she will pass on her whole inheritance to her son who has a male child. The elder sons have only daughters and Balu is still bachelor. Balu is a singer in the marriage functions and he falls in love with Swathi, a girl from a middle-class family. He gets married with her and Swathi becomes pregnant. Balu's best friend, Raja, an honest journalist, is married to Shanthi and his wife is also pregnant. Swathi and Shanthi deliver the same day. Balu has a daughter although Raja has a son. In the meantime, Ranganayaki has a severe heart attack and the doctor says to not reveal shock news. In the hospital, a misunderstanding happens and Balu's father shows Raja's son to Ranganayaki in a serious condition. Ranganayaki is immediately recovered. Balu maintains the lie to save his mother's life. What transpires next forms the rest of the story.
Balabhaskaran (Jayaram) suffers from sleepwalking. He walks long distances in the night and many mishaps happen during this. He is cheated by his friend Johnie (Madhupal) who wants to extort some money from Balabaskar by blackmailing him. Balabasker's father marries him off to Chandrika in the hope that this will help him to get over his sleepwalking.
Raja learns that the girl he loves is in love with another man. When he comes to know about the long-standing dispute between both their families, he goes to their village to unite them.