In the 18th year of the Republic of China, Zhong Jingxuan, who had been away from home for seven years, returned to Shanghai because his father was critically ill, but he was involved in a family inheritance dispute and the mystery of his father's mysterious death. His father's dying instructions to "take care of Hu Qingxi" revealed the shocking secrets of the Yongchang shipwreck three years ago - cigarette smuggling, arms suspicions, and Japanese spy infiltration intertwined. Zhong Jingxuan and Hu Qingxi join hands to fight against the Youth Gang Du Yuesheng, Japanese forces and family traitors, and trace the truth in the undercurrents of Shanghai, Nanjing and Guangzhou. Using codes and blueprints as keys, they uncover a life-and-death game concerning the fate of the country.
