 "The City of Brass" features a group of travellers on an archaeological expedition across the Sahara to find an ancient lost city and attempt to recover a brass vessel that Solomon once used to trap a jinn, and, along the way, encounter a mummified queen, petrified inhabitants, lifelike humanoid robots and automata, seductive marionettes dancing without strings, and a brass horseman robot who directs the party towards the ancient city.