Forensic officer Mugilan falls in love with Megha. But she disappears around the same time as when Mugilan discovers incriminating evidence against a corrupt police officer who is up for a promotion.

When his father is murdered by an unknown gang, Natesan sets out to find the killers. But, he is shocked to learn that his father’s death has a connection with the murder of his childhood friend.

Murali (Vaibhav), also known as ‘Idhayam’ Murali by his friends as he is like the emotional lead character from the film, Idhayam (1990), rings his friends, Vinoth (Vivek Prasanna) and Kishore (Arun Prasath) informing them that he is going to commit suicide, as he is not able to bear the engagement of his college mate, Madhu (Priya Bhavani Shankar), whom Murali has feelings of one-sided love. In an attempt to stop his suicide, Vinoth and Kishore request Madhu to speak badly about Murali, which Madhu does hesitantly. On hearing this, Murali feels outraged and cancels his suicide attempt. He also believes that Madhu is a bad girl. However, he blabbers about Madhu and how he loved her which slightly moves Madhu. The marriage is postponed by a year.
One year after, life moves on and Kishore invites Vinoth and Murali for his wedding. However, Vinoth is injured in an accident, so, Murali attends the marriage and also performs with his music crew, “Meyadha Maan”. Murali meets Madhu and they pick up a quarrel over a room allotment. Murali walks out of the marriage after understanding that both Vinoth and Kishore are hell bent in ensuring that he does not torture Madhu during the marriage. Madhu is pained to hear that Murali still does not know about the drama on that suicide night.

The movie begins with the marriage of John (Arya) and Regina (Nayantara) at a church. The marriage is an arranged one, to which both have consented reluctantly to make their parents happy. After the marriage they live together as strangers in an apartment, where the neighbors are upset with John who comes home drunk every night, which he does deliberately to annoy Regina. Eventually, Regina applies for a transfer to Australia to stay away from John.

Arivazhagan (Manoj. K. Bharathi) is from Chennai and has grown up to be a good-for-nothing fellow because of the neglect and ill-treatment by the hands of his parents (Jaiganesh and Fathima Babu). His only aim in life is to be an irritant to his father. The entire family attends the marriage of Savitri (Richa) in Bangalore, and when the groom disappears, Arivu offers to take his place. The marriage never happens, but Savitri shows up at Arivu’s house later, asking him to give her refuge. When he moves out of the house to take up residence with his friends, she follows him there too. Initially irritated by her, Arivu realises that he is gradually falling in love with her.

Gokulan sees an attractive girl in his dream and is determined to find her. However, his father gets him engaged to another girl. Complications arise when he meets the woman of his dream soon after.

Murthy (Prashanth) earns his living taking the blame for the mistakes of other people, and so the jail is his second home. Dhanushkodi (Raghuvaran) has sworn to kill ex-collector Ramanathan’s (Vijayakumar) son Santhosh (Praveen Gandhi), and so, Ramanathan has transferred Santhosh to Mauritius while telling the world he has run away. Wishing to save his son, he hires Murthy to act as him, hoping Dhanushkodi would kill him instead of his actual son. Murthy too accepts the gig since his lover Preeti (Jyotika) is Ramanathan’s niece. In the climax, Santhosh supports Dhanushkodi for killing his father, but Dhanushkodi kills Santhosh. The film ends with Murthy taking the blame for killing Santhosh and surrendering himself to police.

Prabhu hails from a poor family, and lies to Sukanya about him being poor and marries her. Sukanya’s mother plots to destroy their marriage, but succumbs to their love.

The film revolves around Karthik a happy-go-lucky youngster who is obsessed with astrology. One day, he and his friend come across a drug dealer which lands them in trouble.

Thiruppaachi and Sengulam are neighboring villages with a history of enmity between them. Maayan (Manoj) and Machakanni (Riya Sen) meet on the day of her engagement and its love at first sight. Her marriage itself gets called off when the groom and his family insult Machakanni’s family and her romance with Maayan continues. But when her brother finds out about him, all hell breaks loose. The turned-down bridegroom is still itching for revenge and figuring out that the only way to extract it is to marry Machakanni, he pleads for forgiveness and succeeds in melting her brother’s heart. The marriage is finalised but Maayan’s friends swear to unite the star-crossed lovers. There is also a subplot of Maayan’s aunt (Radhika) trying to get her daughter married off to Maayan.

A man is so deeply in love with his childhood friend that he is willing to go to any lengths to protect her, even commit murder.

A couple of wastrels chances upon a bag full of American currency. A corrupt cop and a ruthless pawnbroker are also after the bag.