九龍不敗 = Invincible dragon /
Jiulong bu bai = Invincible dragon

Summary/Review: The undercover agent with dragon tattoo Kowloon (Max Zhang) continually helped the police to solve mysterious cases, which made him known as a rising star. However, his impulsive personality dragged him into endless troubles. He got himself into fights with the Macau detective, as well as an American Army veteran Alexander who has a secret linkage to Kowloon's background...