Three parents who have lost their children are involved with each other because of a deal; they have no soul in their eyes and hatred in their hearts, and each of them, with their own purposes, set out on the road of seeking revenge for their children, and staged a bizarre and dangerous killing in the barren land.
Due to government shuffle during the reign of Wu Zetian, the ambitious Di Renjie was relegated to a remote town in the east. Di showed extraordinary talent in case-solving, but as he probed further, more and more secrets were revealed. He embarked on a nationwide journey and solved many mysterious cases. In the end, he returned to Chang'an and reunited with his father. Together, they tackled a crisis that threatened peace and order.