In this continuation of the Silver Lion narrative, Kara Ben Nemsi and Halef set out to revisit ancient monuments that had been the sites of several of their previous adventures. On their way to the ruins of Babylon, they encounter two men wearing rings identifying them as members of the “Shadows,” an arcane cult involved in smuggling in the region. Using a ruse, our heroes are able to ascertain that these criminals are planning to ambush the caravan of a Persian chamberlain. During their quest to prevent the crime, Kara and Halef encounter some old foes, make new friends, and are locked up in a prison inside the Tower of Babel. Kara Ben Nemsi is able to escape, but will he be able to rescue his friend and secure the smugglers’ hidden treasures?