Old Dunling is an exceptionally unique city in this world; it is not only the capital of Ingwig and a technological forefront, but its most distinctive feature is being encased by several hidden systems.
Ordinary citizens are completely unaware of this. The long-term burst of technology has made people easily accept these new things, and amid such numbness, few can notice the existence of these secrets, let alone the Purification Mechanism.
Due to the existence of regulations, the information within the Purification Mechanism is not entirely open. Most soldiers only know about the Mechanical Institute but are not aware that right below is the mysterious Perpetual Motion Pump, not to mention Black Mountain Hospital, Dunling Tower, and so on.
With the advancement of ranks, more secrets are revealed to the newcomers until they reach the pinnacle.
Yet at this moment, one does not feel joy for knowing all the secrets. He will doubt, just like Merlin does now.
