Ye Xiao Tian works as a prison guard at the Ministry of Justice in the capital city. During his time of service, he takes on an assignment to deliver a message to a certain family in a province several thousand miles away and thus begins his exciting journey and series of adventures where he accumulates friends and encounters various challenges and opponents. His irrepressible cheeky attitude, however, makes him quite the force to be reckoned with. (Source: MyDramaList) ~~ Adapted from the novel "Ye Tian Zi" (夜天子) by Yue Gan (月关).