Shen Qingtang, the legitimate daughter of the Zhenguo General's Mansion, helped Prince Gu Chengan ascend the throne, but was framed by the noble concubine Su Mei as a treasonous enemy and was banished to the cold palace. She relied on her farming skills to open up wasteland and grow vegetables and medicinal materials. While providing food and clothing, she also attracted palace maids and eunuchs. After discovering that the water in the cold palace well was poisoned, she planned to rebel against Su Meiyi's army. As her power grew, she exposed Su Mei's conspiracy and Gu Chengan's ruthlessness, and finally supported the prince to succeed to the throne as the queen mother. She used the contacts accumulated from farming to control the government and achieve a counterattack.