From the introduction: The never-ending city of Haark is where most of the commerce of the Seven finds its epicenter. Amidst such sprawling wealth, naturally there are those who wish to keep their precious hoards well secured and out of reach of the greedy and desperate. To this end, there are two guilds that specialize in such work—the Lock Wardens and the Keysmith’s Guild. Most would agree that to acquire any latch, bolt, or key from any other source in the city would be scarce worth the time.