When Gan Fengchi arrives in Nanjing, he visits the court official Yang Shouchun, and asks to investigate the matter himself. During the investigation, a person who claims to be the one who has framed Gan Fengchi, surprisingly exposes himself. Moreover, he makes an appointment with Gan Fengchi to meet in a marshland stronghold by the Lake Taihu. The day after Gan Fengchi arrives at Lake Taihu, Qian Long comes to Nanjing with the others.
甘鳳池到南京後，面見部堂大人楊壽春。要求自己親自出去查案。他在查案過程中，有一位自稱是“陷害甘鳳池”的人竟然有意暴露自己的身份，並約甘鳳池到太湖水寨見面。就在甘鳳池到太湖的第二天，乾隆帶著大家來到南京。