A string of murders takes place in Bianjing. The victims die in different ways, but the killer leaves the same blood-red symbol at every crime scene.
The people of Kaifeng Prefecture investigate with all their might, but get nowhere.
Just then, a mysterious young woman arrives in Bianjing. She always wears a strange jade pendant.
Zhan Zhao passes her at a crime scene. Suspicious, he follows her, but she notices him...
Theme: The law's net may be wide, but nothing escapes it.
