It's 1922 and Americans drink in speakeasies and dance to jazz. But in this 1922, things are different. By the Mississippi, the ancient indigenous city of Cahokia lives on - a diverse, industrial metropolis. But a body on a roof is about to spark off a drama that will spill the secrets of this world and bring it either to destruction or rebirth. A thrilling tale of murder and mystery in a city where history has run a little differently from the multiple award-winning author of 'Golden Hill'.