During the Qingyuan period of the Southern Song Dynasty, there was an ancient tomb from the former dynasty near the Jiangnan Water Town, which was said to contain rare treasures. A gang of tomb robbers sneaked into the water town to rob the tomb, causing panic among the people. Local police chief Qin Feng was responsible for the investigation and met Su Qingyue, a woman who has extensive research on ancient tomb culture. Su Qingyue provided Qin Feng with information about the structure of the ancient tomb, and the two teamed up to take advantage of the rivers in the water town to set up an ambush to thwart the tomb robbers' conspiracy, protect the ancient tomb's cultural relics, and reveal the historical secrets of the owner of the ancient tomb.
