Su Langyue was the second son of the Jiangnan Su family. His eldest brother, Su Wen, was an official in the court, and his third brother, Su Ding, was fighting for fame on the battlefield. As the middle son, Su Langyue was neither in politics nor the army, nor was he in business to be a wealthy landowner.
Qin Su is the assassin of the Duanwu Tower. He is the last assassin of the Duanwu Tower. He can hardly be assigned any tasks. After fifteen years of confusion, he finally received his first task after joining the army.