A missing police pistol is connected to a series of recent heists and murders. Its owner Wong, vanished while pursuing suspects in the Hong Kong mountains. His partner, Chi-Wai miraculously returned unharmed. Hotshot inspector Hois in charge of the investigation. He knows the only chance he has of cracking the case is to ask for help from his mentor, former boss Bun. Bun was a gifted criminal profiler until he went insane several years ago. Since then, he lives in seclusion with his beloved wife May. Bun has the gift to see a person’s inner personality, where their subconscious desires, emotions and mental states are laid bare. For Bun, they are the key to unlocking a killer’s identity, he comes to the conclusion Chi-Wai has a total of seven personalities and the cop’s alternate identities are responsible for his murderous behaviour. While Bun’s investigation and mental state gets increasingly out of control, Ho starts to believe he has made a serious mistake in asking this mad detective to help with the inquiry.What begins as a quest for an answer has now taken a schizophrenic turn where truth and lies, reality and delusions intertwine…