Ma Wenshun (played by Lu Jue'an) is passionate about the history and assembly of watches, and has a special liking for the missing moon watch "Moonwatch" (the prototype is an Omega Speedmaster). Wenshun, who makes a living by assembling "dual-period watches", was caught by Uncle Lai (played by Jiang Tao), the boss of the underground watch black market "Laibaohang" when he was selling dual-period watches to gangster Niu Rong (played by Zhang Songzhi). Uncle Lai threatened Wenshun to go to Tokyo, Japan to sneak into a high-end watch shop for him, and steal three "Picasso" watches that will be auctioned in a month, and then resell them on the black market. Uncle Lai, a cruel "second-generation ancestor", assigned Uncle Lai's loyal men "Da Zei" (played by Zhang Jicong) and "Qu Wang" (played by Bai Zhi), as well as the son of the locksmith Hong Jie Li Jinyou (played by Lu Hanting), to go to Japan to carry out the mission. But in fact, Uncle Lai intends to use this opportunity to slaughter the family and eliminate all the old officials. As the task of stealing the watch is carried out under many difficulties, the thief and others who realize Uncle Lai's true purpose have to protect themselves before Uncle Lai and the Japanese forces take action, which puts Wen Shun and Jin You into unprecedented danger...