All eighteen scouts at Yanhui Pass were wiped out. The furnace room of the Ordnance Bureau will be executed tomorrow for the crime of inferior swords. Apprentice Shen Li could hear his master's last three breaths from the broken soldiers. Among the eighteen broken knives, there was an extra nineteenth; it told Shen Li that the one who closed the door was one of his own. In order to save his master and the first furnace craftsman, he must follow the fractures, hammer patterns and ordnance black ledgers to catch the mole within three days. But the deeper he investigated, the more he discovered that the batch of "bad knives" that killed his father eight years ago also bore the same wild goose tail mark.
