Shivani Shivaji Roy (Rani Mukerji), a dedicated and brave police officer with Mumbai Police, chases a Delhi-based kingpin, Karan Rastogi (Tahir Raj Bhasin), who runs an organised crime cartel involving child trafficking and drugs. Her aim is to hunt him down and rescue a teenage girl, Pyaari. Pyaari is an orphan who is kidnapped by Karan's men. Shivani had saved Pyaari from being sold by her uncle and started taking care of her, and since then Pyaari is like a daughter to her. She takes the task more personally and goes beyond her legal rights and duties to nab Karan and save Pyaari. Karan, aware that Shivani is continually monitoring his cartel's activities, phones her, suggesting she not interrupt his business. Determined to catch him, Shivani uses intelligence inputs to track down his associate in Mumbai, who leads her to Karan's close aide, Wakeel, in Delhi. Karan, as a warning to Shivani, dismembers one of Pyaari's fingers and sends it to Shivani's house wrapped in a gift box, and gets Shivani's husband abused and thrashed.