Ratchagan () is a 1997 Indian Tamil-language romantic action film written, produced by K. T. Kunjumon, and directed by Praveen Gandhi. It stars Nagarjuna and Sushmita Sen, alongside Raghuvaran, S. P. Balasubrahmanyam, Vadivelu and Girish Karnad in supporting roles. The film released on 30 October 1997. It was the most expensive Indian film at the time of release. Notably, this marks the first and last Tamil debut of Sushmita Sen and remains the only Tamil film she has acted. Plot Ajay (Nagarjuna) is an unemployed youth who always gets into trouble because of his temper. He gets heated up when he encounters anyone committing a crime; he takes the law into his own hands, beats them up and then gives them some free advice. Ajay's father Padmanabhan (S. P. Balasubrahmanyam), who works for an insurance firm, is very unhappy with his son's attitude, and tries his best to change his attitude through a meditation expert, but fails in this matter as the expert suggests that Ajay's anguish is reasonable. Ajay meets Sonia (Sushmita Sen) through his father, and she falls in love with him. What Sonia likes about Ajay is his temper and anger when he encounters anything, which is against the law. Sonia gets Padmanabhan's help to get Ajay to love her. Still, Ajay is not interested in her and seriously rejects her at first; but he later changes his mind after going through some unusual situations, and love blossoms between them. Sonia's father, Sriram (Girish Karnad), is an industrialist who owns the Daewoo automotive manufacturing facility. He has no objection to his daughter's relationship with Ajay, but has one condition: Ajay must become employed in his factory, control his temper for three months, and not get into any fight whatsoever, even if he encounters a crime happening in front of his eyes. If Ajay cannot do this, he will not be allowed to marry Sonia. With a heavy heart, Ajay agrees to the condition; Sonia's love for Ajay deepens, and Sriram offers Ajay a job in his factory. Sriram actually has his own problems with his factory in a loss; ten of his workers are working with his rival and younger stepbrother Gnaneswar (Raghuvaran), and they hamper the progress of his factory with frequent, pre-planned mishaps. This leads to the factory's property loss. Gnaneswar is the son of Sriram's stepmother, who gets deceived by Sriram and loses his