At the Beginning, He Was Sent by His Father to Be an Undercover Agent.

In the Gyeonggi Guard, Li Lanzhou and Sylvia Yunshu broke the situation side by side, and their feelings secretly arose. But a storm suddenly came, and she thought her lover died at the hands of her father. Heartbroken, she took refuge in the Queen Mother, turning into a "mad dog" that bit into Prince Jing's palace. An extremely misplaced dead game, a huge gamble with life as the bet.