This film tells the story of the late Ming Dynasty, when eunuchs were in power. The old eunuch Cao Jinhuai retired to his hometown accompanied by his guard Tang Wei. On the way, they encountered heavy rain and had to sleep in the abandoned Lantingshan Post Station. In addition to them, several groups of people had already moved in. At night, everyone found that Yuan Kuogang's servant Hou Si was killed and hung on the beams, which led to a family massacre that happened here more than 20 years ago. The one who gave the order was Cao Jinhuai, and the one who was killed was his former classmate Pu Shichuan. And today's murder is the revenge plan of Pu Shichuan's descendants. In the end, Cao Jinhuai and his guards were killed, and the treacherous ministers were eradicated.