What if Egypt was quickly modernizing in the 1910s and also djinns and other spirits were real? One djinn seems to be haunting team car 015 in Cairo's overhead public transportation system. Agents Hamed and Onsi have been dispatched by the ministry to solve the problem.
Hamed is stuffy, but trying to be okay with modernization. Onsi is English educated and fits in better, but is a rookie agent.
They're charming, and the world Clark has created is interesting and has lots of potential.