Nine powerful families referred to as the "Old Nine Gates" or the "Mystic Nine Clan" guard the town of Changsha during the era of the republic. Zhang Qi Shan/Fo Ye who is the leader of the nine gates, investigates a mysterious train that ends up at his Changsha station that leads to an equally mysterious mine. In order to solve the mystery, he entrusts the help of Qi Tie Zui/Ba Ye and Er Yue Hong/Er Ye, who is an opera singer from a family of archaeologists. Before they can start their mission, they must find medicine to help Er Ye's wife who is terminally ill. Along the way, they meet a young mistress of the hotel Yin Xin Yue and discover a dangerous plot that could take down the people of Changsha. Will they be able to help Er Ye's wife and unravel a mystery that could save their people? (Source: Viki; edited by MyDramaList)