In the early Ming Dynasty, commoner Xia Xun accidentally takes the place of the deceased scholar Yang Xu, becoming a pawn of the Jinyiwei, the secret police. After witnessing their ruthless tactics, he decides to fight against injustice. Along the way, he meets Xie Yufei, Ximen Lang, and Ji Gang, forming lasting bonds with them.
The fox demon princess Qingfeng stole the fox spirit ring and came to the world, but was turned into a white fox by heaven. Scholar Geng Qubing was injured when he encountered the white fox and released it to the mountains after rescue. Later, Geng Qubing offended the powerful and was framed for fraud and fell into a low life. Qingfeng repayed his kindness, concealed his identity, and silently helped Geng Qubing who was in trouble, and found hope in life again.