The story centers on six youngsters, who experience the downfalls of teenage life. The film conveys a message about the importance of a good education and career over other distractions, such as romance and sex.

Two lovers want to get married, but only with their parents' consent.

College friends Jenny and Shiva part ways due to a misunderstanding. Although they are in love and realize they cannot live without each other, their egos prevent them from uniting.

Rajesh Shivakumar is a college hoodlum who has his first crush on Reena Joseph, who unfortunately, is engaged to be married to Rajiv Samuel, an Indian engineer settled abroad. In an effort to gain her heart, Maddy impersonates Rajiv and gets close to Reena, aided by his grandfather Subbuni and his crooked sidekick Chockalingam. However, the real Rajiv shows up, bringing a shocking end to Reena's romantic interlude.

The father of twin brothers wants to get them married to only twin sisters. But one of the brothers falls in love with a woman does not have a twin sister.

The story revolves around a teenager from a conservative family who struggles to strike a balance between societal expectations and personal desires. According to the popular adage, Achcham (Fear), Madam (Innocence), Naanam (Coyness), Payirppu (Chastity) are the four "ideal" qualities that every good Tamil girl must possess.

Deva works for Arumugam, a smuggler, who has taken care of him for many years. However, when his best friend gets killed, Deva decides to help the police to nab a dangerous drug lord.

Shiva (Bharath) enters into St.Peters college, Bangalore and meets Pooja (Renuka Menon), who was born and brought up in the United States and has come to India to stay with her grandparents while completing her college education. Shiva falls in love with her but soon realises that their characters are totally different. Pooja feels alone, like a fish out of water in India and she wants to return to the US. So Shiva thinks about a plan to get her to stay and he expresses his love to her by creating a fictitious character MR X but never reveals about the character till the end. Pooja who got impressed by MR X refuses to see him in the later stage but understand and accepts shiva's true love.

The story, set in the backdrop of Nallore, a small town in Thoothukudi District, revolves around Sub-Inspector Durai Singam, a brave and just policeman who serves in his hometown primarily to fulfill his father’s wish. Durai Singam settles every dispute in his town patiently with his words of wisdom and resorts to force only when the situation demands it. Kavya, a city girl who comes on vacation to Nallore, falls in love with Durai Singam. Erimalai, Durai Singam's bumbling colleague and friend, often accompanies him.

A brilliant medical practitioner finds himself at the centre of a murder plot after taking the daughter of a Russian Police Commissioner back to his hotel room.

A reputed cop from Tamil Nadu takes charge in Andhra Pradesh to solve the mysterious murder of a top police officer, and takes on local thugs and criminals during the course of his mission.

DCP Raghavan sets off on the trail of the killers of Rani, the daughter of a police officer. Following this, many more murders take place, leading him to New York to capture the maniac killer.

A righteous young man who helps everyone gain their rightful justice, gets recruited as an undercover agent to work on a high profile case that involves a crime lord working for a corrupt minister who also happens to be the father of his romantic interest.

Sridhar and Preeti begin to like each other, but part ways without confessing their feelings. Over the years, they search for each other in vain while fate keeps working its own magic. The film was also simultaneously shot and released in Telugu with a slightly different cast as Nee Manasu Naaku Telusu.

Picking up the storyline from where Singam ended, Duraisingam has gone undercover after meeting the Home Minister and is working as an NCC officer in a school in Thoothukudi. The only people who know about this operation are the Chief Minister and Home Minister apart from himself.

Muthu Pandi, a village strongman, decides to marry Dhanalakshmi, and begins his quest by eliminating everyone who opposes their union - starting with both her brothers. In desperation, Dhanalakshmi decides to escape from the village, and in the process is unwittingly assisted by a university Kabaddi player Velu.

College friends Siddhu and Madhumati part ways due to a misunderstanding. Although they are in love and realize they cannot live without each other, their egos prevent them from uniting.

A goon, who dreams of making it big in life, a student leader, who strives to keep politicians away from college election and a third guy who wants to settle abroad. Their lives change after an incident on a bridge.

A man loves a woman even though she is three years older than him. Although she reciprocates initially, the age difference and his past with a classmate lead her to break up with him.

Priya decides that she wants to be a nun, much to the horror of her father and Thomas, the boy who is in love with her. Thomas decides to enlist the help of Deva to change her mind.