A girl who was picked up by a killer was extremely talented and became the most valuable tool of the killer. She was sent to the most valuable female owner of a certain arcade to kill people and make money. Unexpectedly, the owner of the arcade fell in love with a magician and dragged his toolman Xiaosheng to act as a bodyguard for the magician to eliminate obstacles. Until one day, the tool man Xiaosheng discovered that the magic stick was not a magic stick, but a capable onmyoji. The tool man also discovered that the tool man was not a pure tool man. She also had her own thoughts.