Ah Ying has known why he lives since he was ten years old. She wants to become the shadow of Her Highness the Princess, imitate her walk, imitate her frown, copy every little habit of hers, until she becomes a "fake" who is more like a princess than a princess. Just because they are twins from the same mother, one is noble and unparalleled, and the other is born as a backup "substitute". At the age of sixteen, the real Jinzhiyuye died of illness in the palace. Aying was pushed onto the chessboard by his "master" to replace his sister and became the perfect puppet to maintain the family's glory. The master said: "Remember, your life, your face, everything about you belongs to the princess. You have to secure power for her, avenge her, and for her... Marry the man she hated most during her lifetime." That man was the most feared regent in the dynasty. He held power and was deeply scheming. It was rumored that he single-handedly drove his sister to a dead end. Everyone thought that she would be an obedient pawn. Even the regent held her chin, his eyes playful: "What tricks do you want to play with her face?" Aying lowered his eyes and smiled, as docile as a rabbit. No one knows that this rabbit is sharpening its claws in secret. She used the regent to eradicate dissidents, used his hands to clean the court, and worked step by step to weave power into an airtight web. Until the end, she personally handed the poisoned wine to the old emperor, completing the earth-shattering "substitute regicide". When she was wearing a dragon robe and overlooking all living beings, the powerful regent stood at the foot of the stairs, his eyes dark and unclear. "Your Highness," he asked hoarsely, "who are you now?" Aying smiled: