Grand Tutor's legitimate daughter Su Zhiming's family was wrongly accused, and she entered the palace reduced to a low-ranking talented lady, only to be framed by Noble Consort Hui at the Lantern Festival banquet. Amidst the perilous inner palace, she does not rely on allure to curry favor, but with intelligence and calmness, time and again breaks through traps and collects human and physical evidence. Circling between external relatives' forces and court gameplays, she step by step uncovers the truth of the year when the Grand Tutor was framed with fabricated charges. After her grievance was cleared of snow, she rejected the inner palace's glory and wealth, resolutely requested resignation to leave the palace, and pursued her own free life.