Shen Qingtang, the legitimate daughter of the Zhenyuan Marquis Mansion, was suppressed by her concubine Wang and her concubine Shen Qingyao for a long time because of her mother's early death. Her engagement was stolen and her younger brother was in danger. In order to protect her loved ones, she relied on her keen observation and cruel methods to first expose the adultery between Wang and the housekeeper and force her father to divorce his wife; then she designed Shen Qingyao to expose her hypocrisy when the prince chose a concubine and replace her concubine as the crown prince. After entering the palace, faced with the queen's suppression and the concubine's conspiracy, she used a trick to make the concubine slip and blame the queen, expose the queen's illegitimate child, defeat the enemy step by step, and finally become the queen. After taking office, she settled the old accounts of the marquis family, supported her younger brother to seize the title, and used ruthless means to maintain the stability of the harem, becoming the formidable "Poison Queen".
