Moondru Mudichu 1976

Balaji Kamal Haasan and Prasath Rajinikanth are roommates in a bustling Chennai apartment complex. Balaji falls deeply for Selvi Sridevi, an 18-year-old who shares the same building, while Prasath also fixates on her. Pretending to back Balaji’s romance, Prasath quietly schemes to drive a wedge between the two friends, hoping to weaken Balaji’s loyalty to him. Selvi soon suspects Prasath’s true motives when she learns he has seduced Menaka, another resident, exposing a web of manipulation. Yet Selvi struggles to sway Balaji, who hero-worships Prasath and remains in his orbit despite the troubling signs.

The tension erupts during a lakeside picnic with the trio, when Balaji accidentally loses his footing and falls into the water. Prasath refuses to dive in to save him, claiming he cannot swim, a moment that shatters Selvi. Returning home, she faces another blow: her sister, who occasionally appears in films, has been scarred permanently by a fire accident. This tragedy abruptly redirects Selvi’s entire life.

Seeking a path to security, Selvi places herself in a newspaper advertisement for a second marriage to Viswanathan N. Viswanathan, a wealthy man from Salem known to have four children. Viswanathan initially resists marrying a young woman and suggests she take care of his children instead. Impressed by her dedication, he then proposes that she marry his eldest son, who turns out to be none other than Prasath, who visits his father on weekends.

Prasath persists in pressuring Selvi to marry him, giving her a week to decide. In a bold move to secure her future, Selvi convinces Viswanathan to marry her before Prasath returns the following weekend, leaving Prasath in an awkward position. Selvi staunchly defies him, using her new status as a married woman and mother-to-be to assert her stance. Meanwhile, Selvi encounters Menaka again, who has given birth to Prasath’s child and brings the baby into their home, urging Prasath to marry her as well; he rejects that arrangement.

Eventually, Viswanathan learns of the past relationship between Prasath and Selvi and orchestrates a situation meant to force Prasath to face his misdeeds. After confronting his mistakes, Prasath undergoes a change of heart and agrees to marry Menaka.