Murugappa 'Munaruna' (Dhanush) is a Tamil worker in 1960s Burma. His friend Saamuda falls in love with Mallika, but Mallika loves Munaruna. Munaruna saves Samudra (Amyra Dastur), the daughter of a Burmese army general, from a Ferris wheel accident and they fall in love. When Mallika learns about this, she is devastated and marries Saamuda. The Burmese general disapproves of the union between Munaruna and Samudra, and revokes the privileges that the Tamil immigrants had until then. 1962 Burmese coup d'état and the Tamil nationals flee Burma. Munaruna and Samudra join the refugees on a ship with Saamuda and Mallika. When Samudra's father comes looking for her, Mallika spitefully reveals where they are hiding. As Samudra and Munaruna try to escape by diving into the ocean, Munaruna is shot and killed. Samudra handcuffs herself to Munaruna and drowns with him after promising to be together forever.