The movie starts off with 4 friends Kalim (Angad Bedi), Gautam (Neil Bhoopalam), Maya (Kangana Ranaut) and Abhay (Randeep Hooda) starting a gang called the "Ungli" gang which fights against corruption. Their job is to bug corrupt people and teach them moral lessons quite unconventionally. They target a corrupt minister and become the most wanted people in Mumbai. Their case is the responsibility of ACP Ashok Kale (Sanjay Dutt), whose pal Nikhil Abhyankar (Emraan Hashmi) shortly joins the gang. But soon, after he faces trouble, Kaale is compelled to seek help from the gang when Nikhil helps him expose the gang's greatest target, B.R. Dayal (Mahesh Manjrekar) and his son Anshuman. Kaale instigates a sting operation against the Mumbai police and is successful in preventing his transfer. Kaale thanks the "Ungli" gang and he assures them that the city won't need an "Ungli" gang as long as the administrations are running properly in accordance to public demands.