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.
A girl breaks up with her lover after a rich guy proposes marriage to her. The lover gets the power of invisibility due to an accident; he uses this to hurt his rival, play tricks on people and even commit crime.
Thirupathi (Vadivelu), Ezhumalai (S. Ve. Shekher) and Venkatesa (Prabhu) are poor friends who tried to become rich. Nachiappan (Venniradai Moorthy), a bungalow watchman, has three daughters : Lalitha (Kovai Sarala), Padmini (Urvashi) and Ragini (Roja). When his owner left the bungalow on vacation, Nachiappan's daughters decide to live there. Then, Nachiappan rents his owner's top portion bungalow to Thirupathi, Ezhumalai and Venkatesa who lied about their job.
Rajeshwari is the strict disciplinarian of the family that keeps everyone under her control – particularly her husband Rajasekhar. Her four sons live by her rules without question. When her second son marries, his new wife's younger sister Lakshmi comes to stay with the family. Lakshmi's carefree and easy going attitude endears her to the family but puts her at odds with Rajeshwari. Raja, the family's third son and Lakshmi also fall in love. One of Lakshmi's pranks pushes Rajeshwari to her limit and creates fissures in the family. A crisis eventually sets things in motion to solve all the problems.
Murli, a stylish and handsome young man, is forced by his father to get married to Arukani, a village girl. To escape from his wife and father, he takes a job transfer to Bangalore, where he falls in love with Julie and gets married. Murli does not reveal his past to Julie, however, Arukani ends up at his house in Bangalore.
The film tells the story of Chandru, a singer who is touring Singapore with his band where he meets his love interest Sona only to find that she is terminally ill. The movie takes a turn when Chandru finds out about Sona’s cancer and decides to grant her final wish of performing on stage with his band. Ninaithale Inikkum was filmed around various locations in Singapore such as Paya Lebar Airport, Mount Faber, Orchard Towers and the Singapore River.