Two dons, Cheliyan and David are enemies and Cheliyan kills David's brother. David swears to avenge his brother's death and waits for the right opportunity. Shiva is a youth from Kumbakonam who unites lovers and his family support him. This brings him several troubles, one of which from David when Shiva stops David's marriage with a girl who refused to marry him. David wants to know who stopped his marriage and leaves the place without a word after seeing him. This worries his father, Ratnam as he fears that David might harm his son. Shiva hallucinates a woman who he calls Mala, who asks him 'Why did you do like this?' and he replies that he will correct everything. He is having a trouble for a reason and his family consoles him. Shiva's sister is getting married and Shiva ensures that no trouble comes in the marriage. However, on the day before marriage Shiva had to face a critical situation through David who threatens to stop his sister's marriage like how Shiva stopped his marriage. Shiva begs David and tells him that he is ready to do anything for him in return of letting his sister's marriage happen without any problem. David demands him to abduct a woman from Madurai, who is the daughter of Minister Manivasagam, a big shot in Madurai . Shiva agrees and leaves for Madurai missing his sister's wedding.
At Madurai, he finds Bharati, the fiancée of Cheliyan, who David want him to abduct. Shiva intends to take a selfie with her and make David believe that he abducted her but things turn in unexpected way when Bharati announces everyone including her family that she is going to elope with Shiva, getting everyone to think he is her boyfriend. Manivasagam's men try to stop them, but they fly away to Coimbatore, the headquarters of Cheliyan. Shiva ensures that his sister's marriage happens without any problems and gets updates from his friend, Keerai. At Coimbatore, Bharati waits for Shiva to propose her but Shiva is confused about why she eloped with him. David reaches Coimbatore and challenges Cheliyan that he abducted Bharati. Cheliyan rushes to the mall he owns where Shiva and Bharathi are having coffee time. Bharati encourages him to propose her, but in turn Shiva tells about his childhood love.
Shiva during his 6th standard was in love with a girl named Mala, his tuition teacher who is very much elder to him. The entire men of the town fall in love with her including a fresh doctor graduate Selvam. Mala reciprocates his love as well though both of them not declared to each other. Shiva misunderstands his love for Mala, but Mala tells him that he loves him as her brother. Mala's father cheats people with fraud chit funds and he demands Mala to vacate the town failing on which he threatens her that he will commit suicide. Mala writes a letter to Selvam and asks Shiva to deliver it to him. However on the way, Shiva's friends tempt him to watch a movie. The next morning, Selvam is shocked to know that Mala left the town without leaving any message. People who were deceived by Mala's father demand money from Selvam and they thrash Selvam's father leading to his death. Selvam turns insane out of shock. Shiva understands that the letter which he failed to deliver to Selvam is the reason behind his insanity. He is not able to recover from guilt and that is why he hallucinates Mala. To overcome his guilt, he starts to help lovers to get united. Bharati also reveals why she eloped with Shiva.
Bharati met Shiva during an 80th birthday marriage event of an elderly couple which was organised by Shiva. She was attracted by the fact that his family is supporting him for his acts and every one of them talks very good about him. She was waiting for a right time to meet him, but destiny brought him to her. She declares her love for him and Shiva is shocked. David calls Shiva, tells him to leave her, and vacate the place. When Shiva resists, he threatens to kill Ratnam. Out of guilt once again, he leaves the place. Things take a turn when Mala meets him in a situation where several goons chase her. She requests to take her to the police station. Shiva reveals himself and he saves Mala from the goons. David forcibly takes Bharati with him and takes her to Cheliyan. David and Cheliyan come face to face to kill each other. Shiva interrupts and takes Bharati with him. Cheliyan tries to stop them, but David interrupts Cheliyan to avenge. After a series of fights, Shiva takes Bharati with him to his place Kumbakonam along with Mala. Back in Coimbatore, Cheliyan and David try to get rid of each other. In Kumbakonam, Shiva unites Mala with Selvam. Shiva tears off the letter which he failed to deliver to Selvam years ago without reading what has been written in it.