Margazhi 16

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In Thoothukudi, in the 1990s, Kathir (Jayanth) is a carefree youngster who spends his time drinking and hanging out with his friends. He lives with his widow mother and sister. His neighbour Jennifer (Srinidhi) is a student in tenth grade and she lives with her parents and two sisters. At first, she hates Kathir thinking that he is a bad person when he talked to her classmate and he had a fight with the rowdy Madamurugan. Jennifer then comes to know that Madamurugan had molested her classmate and Kathir beat him up to punish him. Jennifer slowly develops a soft corner for him and they eventually fall in love with each other. During a dance function, Madamurugan misbehaves with Jennifer and Kathir has again a fight with him thus the police arrest Kathir. At the police station, the police inspector (Srinivas) warns Kathir not to do it again and releases him. The police inspector is, in fact, Jennifer's close relative. Kathir's mother wants him to become a responsible person so she forces Kathir to go to Chennai without delay. Kathir could not tell Jennifer about his departure and he instead decides to go to the nearer city Tirunelveli where one of his uncles live. There, he works in a cinema theatre and often returns to his city to meet Jennifer with the bike of a cinema client. Kathir comes to know that Madamurugan's brother Madasamy (Stunt Silva) has threatened his mother and one night, he beats Madasamy up. Madasamy who couldn't recognize the aggressor in the dark sets out in search of him. Thereafter, Jennifer's father accepts for the marriage but under multiple conditions: his first daughter must get married, Jennifer must finish her studies and Kathir have to earn enough money to marry her. Later, Madasamy finds his aggressor Kathir and he tries to run over Kathir with his vehicle but Kathir avoids it at the last moment and gets hit by another vehicle. Many years later, Jennifer has developed a mental illness and refuses to get married. To treat her, her parents take her to a special place for the mentally ill. There, Jennifer recognizes Kathir who is now a mentally ill person. In a state of shock, Jennifer recollects her past life and she is completely back to her normal self. Jennifer who wants to be with Kathir starts to act like a mentally ill person in front of her parents and they leave her there.