A piece of jade was unearthed from the tomb of King Nanhuai, but for some unknown reason, blood-red lines appeared repeatedly. The jade phantom has two jewels, which look like a ring one night and become a jue night after night. Yujue is a double jade, but for some reason half of it was lost, and only this half became Yujue. Accompanying King Nanhuai, he has been buried underground for thousands of years, and has only been seen again in recent months. When experts investigate the origin of the red lines, they seem to be vaguely pointing to the recent serial murders in Nanhuai City...