Bichhoo is a story of a contract killer (Bobby Deol) and a traumatised girl (Rani Mukherjee). Rani is a victim of family pressure, who later turns into an eye-witness of her own family killings. Ashish Vidhyarthi is the ACP (Narcotics),who himself is a drug peddler. Rani had seen him kill her family members and Ashish is now after Rani to eliminate her. Bobby provides Rani with protection. How Bobby helps her to escape the ACP is the rest of the story.