Theri (English: Spark) is a 2016 Indian Tamil-language action thriller film written and directed by Atlee and produced by Kalaipuli S. Thanu. The film features Vijay, Samantha Ruth Prabhu and Amy Jackson in the lead roles, while Mahendran, Prabhu and Raadhika Sarathkumar amongst others form an ensemble cast. Featuring music composed by G. V. Prakash Kumar and cinematography handled by George C. Williams.
The film had a worldwide release on 14 April 2016. It has been dubbed into Telugu and was released as Policeodu (English: Police Man) on 15 April 2016, however, the title was later on altered to Police.
Vijay Kumar (Vijay) is the honest and sincere DCP of Chennai. He takes up a case involving the rape and subsequent death of an IT employee Raji. He finds out that the rapist is Ashwin, the son of Labour Minister Vanamaamalai (J. Mahendran). Vijay kills Ashwin and reveals himself as the murderer to Vanamaamalai, who swears to take revenge on him for killing his son. Meanwhile, Vijay falls in love with a medical student Mithra (Samantha Ruth Prabhu) and both eventually get married and lead a happy life. But, Vijay’s happiness is short-lived as Vanamaamalai, his younger brother Ratnam (Azhagam Perumal) and their henchmen barge into his house one night and kill Mithra and Vijay’s mother (Raadhika Sarathkumar). They even brutally assault Vijay and attempt to drown Vijay’s baby daughter Niveditha aka Nivi in the bathtub. The dying Mithra manages to rescue Nivi and asks Vijay to take care of her, but not before making him promise that he will quit the police and be a peaceful and loving father to Nivi, following which she dies in Vijay’s arms. Vijay fakes his death, changes his name to Joseph Kuruvilla and moves to Kerala with Nivi and his constable friend Rajendran (Rajendran) to protect Nivi from Vanamaamalai and his gang.
Five years later, Vijay is leading a happy life in Kerala with Nivi (Baby Nainika), who is now in kindergarten, and is running a bakery with Rajendran. As per Mithra’s dying wish, he gave up violence and raises Nivi to be non-violent. He meets Annie (Amy Jackson), Nivi’s class teacher, and both become good friends. Annie soon finds out about that Joseph is none other than the “late” Vijay Kumar, but Vijay warns her not to tell Nivi about it. One day, while Nivi is going on an excursion, the brakes of the school bus in which Nivi is travelling fails and the bus plunges into the backwater. Vijay, with the help of Annie, Rajendran and the local people, manages to rescue Nivi and the other children. He finds out that Vanamaamalai, who has found out that he and Nivi are still alive, is responsible for the bus plunging into the backwater in order to kill Nivi. Enraged, he decides to abandon his non-violent principles and destroy Vanamaamalai and his gang once and for all.