Because Dasheng was defeated in the border war with Dading, Prince Mo Zidan entered Dading as a hostage. On the first morning when I woke up in a strange country, a child of the same age appeared outside the window on a tree full of flowers. In the rain of flowers, the encounter began... This child named Qin Yue eventually became the king of the great Western country of Xi Yan, a arrogant overlord. Will the years of youth that have passed through stalemate be crushed into dust and transformed into wind under the hooves of Xi Yan's cavalry and the king's ambition? Will there be no trace from now on?