During the reign of Wenzong in the late Tang Dynasty, eunuchs dictated. Tang Wenzong, Wang Ya, Li Xun, Zheng Zhu and others set up a plan called "Change of Nectar" in an attempt to punish the eunuch Qiu Shiliang, but unfortunately failed. The prime minister Wang Ya's whole family was executed and his property confiscated, but only two granddaughters escaped. The younger sister was adopted by Shang Gong Yuxi of the Ziyi Bureau and changed her name to Yu Bing Er. Her sister was determined to take revenge. She changed her name to Yanzhi and became Qiu Shiliang's righteous daughter...