Terrorists attempt to assassinate the Indian Prime Minister, Chandrakanth Varma, in New Delhi. The event security services learn about this and the attack is started when the PM arrives. The PM is saved and sent to his office. The Government thwarts the attempt with National Security Guard (NSG) operations on Varma’s direct orders. Unfortunately the Union minister for Communications is killed as collateral damage.Kaappaan 2019
The deceased’s daughter is Anjali, the PM’s junior office secretary. At the same time, in Thanjavur, Kathiravan aka Kathir, is an organic farmer who also moonlights as a special agent working for the country’s military intelligence. Meanwhile, the captured terrorist reveals another plot to assassinate the PM during his visit to London. The SPG seek Kathir’s help to protect the PM in London and Kathir is able to identify and shoot the suspect. Anjali mistakes Kathir for the assassin and tails him, but he tricks her into getting drunk and shakes her off. Varma then leaves for India only to find that the Indian soldiers in Kashmir were killed by the Pakistani army. Business tycoon and public figure Mahadev meets with Varma and secretly discusses about methods of retaliation.
While celebrating Kathir’s coworker and friend Joseph and his wife Priya’s wedding anniversary, Joseph gets a murder threat and his pet cat is fatally shot. Kathir and Joseph track the mysterious caller but he diverts them with a mini bomb blast and escapes. Meanwhile, Varma leaves to Kashmir to address the public. A mysterious caller tampers with the SPG’s communication system and points to a bomb on the stage where Varma is present. Kathir locates the explosive and throws it away without any casualties. Varma is moved to his convoy but the caller uses this scuffle to diffuse yet another bomb planted in Varma’s car, killing him instantly.As an aftermath of Varma’s untimely demise, there is power struggle for the successor to the PM’s position