A prince with a noble family background has been favored by the emperor since he was a child. He has been favored by the emperor as much as the prince. Behind the favor is hidden the secrets of the throne. Nine sons are taking over the throne, which is shocking at every step. Unexpectedly, the all-powerful prince is————she He is the third son of the emperor. He is cold and arrogant, but he is as tender and helpless towards her. When they reach the pinnacle of power, should they compete with each other or retreat to the mountains and rivers and go boating hand in hand...