Doctor Liu Wen (played by Tony Leung Chiu-wai) appears to be a cynical person, but he is actually very delicate and insightful. He hates the unfair medical system and decides to run a clinic in the red-light district. He is obsessed with medicine and has strong medical skills. He is kind to the poor. Among his patients are brave policemen (played by Lau Ching-wan), women of prostitution, and so on. In addition to treating the physical pain of patients, he is also happy to listen to the voices of these grassroots and become their friends. However, he was framed by his former friend and Liu Wen was in danger of having his doctor's license revoked.