In Kolkata, prisoner Kathiresan “Kaththi” helps the police capture an escaping prisoner Vivek Banerjee but escapes afterwards. He goes to Chennai to escape to Bangkok with his friend Ravi. However, he drops this plan after meeting and falling in love with Ankitha, who dupes him into believing that she wants to marry him after realising that he is having a crush on her and gives him a false phone number claiming it is her own.Kaththi 2014 full Movie
Later, Kaththi and Ravi notice Jeevanandam, who resembles Kaththi, being shot by a group of thugs. They admit him to a hospital, and Kaththi decides to impersonate the injured Jeeva to escape from the police. Under Jeeva’s name, Kaththi and Ravi enter an old-age home run by Jeeva with the intention of stealing ₹ 25 lakhs from there for their Bangkok trip, until Kaththi learns about Jeeva’s mission.
Jeeva is a communist ideologue and post-graduate in hydrology from the arid village of Thanoothu in Tirunelveli district who had discovered groundwater under some lands of the village which could be used as an irrigation source not only for the village, but for the entire Tirunelveli district and the neighbouring Thoothukudi district. However, a greedy MNC owner Chirag cheated the villagers into giving their lands for the construction of a factory. Jeeva gets arrested by the police, and six villagers commit suicide to bring this news to the media forefront and release Jeeva from prison. On learning of the plight of Jeeva and the villagers, Kaththi decides to fight for their cause while still posing as Jeeva.
The people of the old home and Kaththi go to the jury and try to convince him to go in favour of them, but Kaththi starts stating rules and scares the main jury person (whom Chirag had bribed). Kaththi then sends a person (disguised as a hairdresser) to Chirag and makes him lay a fingerprint on Chirag’s neck. After that, Chirag sends 50 men to kill Kaththi, but he defeats them. Meanwhile, Jeeva finds himself in the Kolkata prison. With the help of Vivek, who has heard his story and plans to kill Kaththi, he escapes with Vivek’s henchmen.
Unaware that Jeeva and Vivek’s henchmen are headed for Chennai, Kaththi makes efforts to convince the media to bring the plight of the villagers to national consciousness, but the media is uninterested as they feel it is not a sensational news. A few days later, at the Madras High Court, the judge declares the verdict in favour of Jeeva and the villagers, but adds that Chirag has claimed that certain villagers working abroad have shown their support for the factory. If they cannot prove that their support was faked by Chirag within the next five days, the verdict will go in Chirag’s favour.