Xiao Shiyilang is a little bit bad, but he is cute in a bad way. He usually aims to help the poor and the weak, and lives a carefree and dissolute life until he meets Lian Chengbi, the son of a noble family in the capital - the new master of Lianjia Fort. The two accidentally got involved in a dispute over the mysterious deer-cutting knife, a mysterious treasure that everyone is watching in martial arts legends, and became each other's loyal friends and sweet lovers in the process of fighting side by side.