The young Zhang Yuan comes from a family of generations of constables. To carry on his family's legacy, he joins the Pacification Office and passes its trials to become an Executioner wielding the blade. He diligently cultivates martial arts while also mastering Confucianism and Daoism. He investigates corruption at the Baiyun Fabric Shop, punishes the scholars involved, and repeatedly cracks major black-market cases, rapidly making a name for himself as the Azure Tiger of Luyang. Facing the dangers of the martial world and power struggles within the officialdom, he upholds justice with his blade and perseveres through every challenge, aspiring to become a true swordsman who can wield the blade to deliver justice.