‘Department’ is an action thriller about a police department which is formed by Inspector Mahadev Bhosale (Sanjay Dutt) who along with Shiv Narayan (Rana Daggubati) have been given the task to wipe out the underworld. Both take on the underworld don Sawatya (Vijay Raaz) and his gang. Supporting the department is the gangster-turned-minister, Sarjerao Gaikwad (Amitabh Bachchan). Shiv Narayan finds himself at a crossroad where he gets to know that the department is governed by someone else. What follows next is a tug of war between duty and emotions leading him to ultimately become a part of the system.