Soldaten Frank Dux melder sig til en illegal kampsportsturnering i Hong Kong. Her mødes verdens bedste kæmpere i arenaen, og det minder ikke om julebal i nisseland. Alle kneb gælder og kun den stærkeste går videre til næste runde. Men Dux har heller ikke gået i flinkeskole, så han er klar.
Welcome to Kowloon Walled City: a dystopian townscape where the people are brimming with nostalgia, and where the past, present, and future converge. Amid the hidden emotions and extraordinary daily lives of the men and women working in its confines, a tale of romance begins to unfold for real estate agent Reiko Kujirai―one that feels as familiar as Kowloon itself…
