Hu Linghua is known throughout the imperial court as the fearsome evil princess, a woman whose ruthlessness is whispered about by servants and nobles alike. In truth, she is nothing like her reputation: she has an innocent, lovely face and a pure, gentle personality. This secret is known to no one until Crown Prince Sun Bailian summons her and gives her an unusual command: become his favored consort and, at the same time, take on the guise of his younger brother. Forced into a double life, Linghua begins appearing both as the crown prince’s beloved consort in the harem and as his younger brother, Sun Jiuyuan, in the palace at large. The deception places her at the heart of the Eastern Palace’s intrigues. Using her unique position to observe both the inner chambers and the political corridors, she sets out to uncover the culprit behind a series of strange incidents plaguing the crown prince’s residence. As she skillfully plays both roles, her pure and earnest nature starts to soften the guarded, hidden-hearted Crown Prince, gradually changing his attitude and drawing them closer amid the twists of court conspiracy.