One night in 1941, Kato Takao (original name: Muto Ichiro), the then highest commander of the Japanese Expeditionary Force in Nanjing, came to the People's Paradise Nightclub opened by Master Huang (original name: Huang Si), the leader of the Axe Gang (also known as the Sanlian Gang) to attend the opening ceremony. He also boasted to the so-called "celebrity" in Nanjing about his "achievements in destroying" the Nanjing underground party headquarters. At this time, during the enemy's encirclement and suppression, Shen Nianchu (alias: Wang Yiman), the only surviving new underground party comrade, lost contact with the superior organization and sneaked into the nightclub alone. During this period, a mysterious person secretly told Wang Yiman where Kato was. Wang Yiman disguised himself as a bartender and entered Kato's private room. He accidentally heard Kato and American businessman Bill talking about oil transactions. It turned out that Kato had collected ten tons of gold from China and stored it in the Bank of East Asia, preparing to privately buy oil from American businessmen to support war consumption.