Chatriyan (The warrior) is a 1990 Indian Tamil crime-drama film written and produced by Mani Ratnam, and directed by K. Subash, assistant of Mani Ratnam. The film stars Vijayakanth, Bhanupriya and Revathi in the lead roles. The film has Vijayakanth playing the role of an honest cop and Thilakan as a corrupt politician in the main villain role. This film is one of the super hit films of early 90's and has attained cult status.It was also dubbed in Telegu as Kshatriyudu. The film features a highly acclaimed background score composed by Ilaiyaraaja.
ACP Panneer Selvam a.k.a. Sathriyan (Vijayakanth), an honest cop, gathers enough evidence against a local goon Arumai Nayagam a.k.a. Annachi (Thilakan). Annachi is sent to prison. Annachi avenges his arrest by killing Sathriyan's wife Jaya (Revathi).
Since then, Sathriyan quits the police force and takes care of his children, renting an apartment owned by V. K. Ramaswamy. Banu (Bhanupriya), V. K. Ramaswamy's granddaughter, gets introduced to Sathriyan's children and starts mingling with them, eventually falling in love with Sathriyan.
Meanwhile, Annachi is released from the prison and realizes that he doesn't carry the same respect as he used to before going to jail. His anger against Sathriyan doesn't cease. Annachi challenges Sathriyan to join the police again and try to fight him again.
Sathriyan initially rejects the offer. Annachi tries to provoke Sathriyan by attacking his home and son. Out of frustration over his son's attack, Sathriyan joins the police again and fights Annachi again. Sathriyan's fight against Annachi forms the rest of the plot.