Musiqi was a princess of the previous dynasty and was trained as a chess piece by the current emperor. She was ordered to assassinate the powerful regent Shen Qingzhou, but was imprisoned after the mission failed. "You will be useful." Shen Qingzhou pinched her chin and sneered. He gave her endless favor, allowed her access to court secrets, and even allowed her to pass on false information. At the heaven-sacrifice ceremony, she finally stabbed the dagger into his chest: "Shen Qingzhou, blood debts are repaid with blood." When the blood dyed the dragon robe red, he held her hand and smiled: "Siqi, you finally took action." "The secret order to destroy your entire clan was secretly exchanged by me." "I buried your father's head with my own hands." "The man in black who rescued you from the fire was also me." The palace door collapsed suddenly, and the imperial guards rushed in with knives. Shen Qingzhou swallowed the poisonous wine she prepared and inserted the hosta into her hair: "Let's go quickly." Mu Siqi held his tablet and sank to the bottom of the river. Under the ice, she thought of him always stroking the old hosta late at night: "I'm waiting for an old friend I don't dare to recognize."