In 1948, in a certain Jiangnan water town, all young men were conscripted into the army, and the rest were disabled men and the elderly, weak women and children. The bizarre death of the coachman Ding Dashan in the ruined temple broke the tranquility of the water town. Judging from the six-and-a-half-inch shoe prints and an embroidered shoe left behind, the focus of the suspect fell on Su Er (played by Ruby Lin), who was famous for embroidery. The case was considered adultery and murder. The traditional and conservative gentry led the villagers to frantically sentence Su Er to "pig cage immersion" and left Su Er's pair of underage children desperate and helpless. However, since then, there have been murders in the water town one after another. First, the wife of Cheng Nan (played by Jing Gangshan), who made a pig cage, was pierced through the heart by a bamboo piece and died. Then there was the bizarre death of the gentry. What's more, Su Er was seen floating in the water town at night. What is the truth behind it...?