Based in Chennai, plainclothes police officer Pugazh slays Raka, a male wanted by Inter-pol, during the Shri Ganesh Visarjan. This news alerts his associates, some of who become alert, while others relieved, and Pugazh is instructed to proceed with his next target. The latter then meets with Janavi and both eventually fall in love. She then lets him speak with her wealthy Munich-based father, J.D., who instructs them to come home. Once there, he displays his disapproval for Pugazh. Unable to get close to his target, his stay is prolonged, prompting his mother to also travel there. And it is her arrival that will dramatically alter the entire situation - changing everyone's lives forever.
Farhan Qureshi and Raju Rastogi want to re-unite with their fellow collegian, Rancho, after faking a stroke aboard an Air India plane, and excusing himself from his wife - trouser less - respectively. Enroute, they encounter another student, Chatur Ramalingam, now a successful businessman, who reminds them of a bet they had undertaken 10 years ago. The trio, while recollecting hilarious antics, including their run-ins with the Dean of Delhi's Imperial College of Engineering, Viru Sahastrabudhe, race to locate Rancho, at his last known address - little knowing the secret that was kept from them all this time.