Once upon a time, there was a monarch Sima Haotian. He was benevolent and loved by the common people. But the treacherous prime minister usurped the country, which made him die in battle and the queen fell off a cliff. The young prince Yulong and the son of the loyal general Zhao Yi, Zhao Yu, were luckily saved by Zhao Yi and a sage, narrowly escaping death. Fifteen years later, Yulong took back the throne. Knowing that his mother was still alive, he disguised himself to find her whereabouts, while secretly investigating the hardships of the people and the quality of the officials. Along the way, a series of stories happened...