Two honest and bold police officers Adhi Narayanan, (Kamal Hassan) and Abbas (Arjun Sarja) devise a masterful plan to bring a terrorist group in control, and send two secret vigilance officers, named Anand and Shiva on an operation called Operation "Dhanush". The objective is to infiltrate a terrorist group headed by a man named Badri, and relay information back to Abbas. After a year while relaying information to Abbas, Anand gets caught, but he commits suicide before the terrorists can interrogate him. With information relayed by Anand, Abbas and Adhi know that the terrorists are picking up someone important and going to Trichy.