Two honest and bold police officers Adhi Narayanan (Kamal Hassan) and Abbas (Arjun Sarja) device a master plan to bring in control the Terrorist Groups and send two secret vigilance officers, named Anand and Shiva on an operation called Operation "Dhanush". The objective is to infiltrate a terror group headed by a man named Badri (Nassar), and relay information back to Abbas. A leak from inside the police camp leads the terrorist to oust Anand as a spy but before they are able to torture him and get information on the second spy, he commits suicide.