The genius Bu Zhao, who is proficient in the secret art of dwarf forging, lurks among the various forces surging in the concession of the Republic of China. His only companion is the single heroine Li Sui who walks hand in hand with him. The two relied on the hidden dwarf foundry, and used their identities as repairers of Western ordnance to deliver top-secret intelligence. They used special secret patterns carved into the weapons to deliver key information, shattering the enemy's plots time and time again.
