Plot synopsis: 1931, Shanghai. In a maze of luxurious nightclubs and neon streets, foreign intelligence collides. A secret cargo, codenamed Black Silk, is being transported to the city. In search of a mysterious object, the heroes get on a passenger liner and an airship, which turn out to be huge traps. There are Japanese agents all around, the endless ocean and sky are overboard, and time is running out by the minute.