Sixteen-year-old Wu Johanna is the granddaughter of the legendary trader Marco Polo. In the wake of her father's death, however, Johanna finds that lineage counts for little amid the disintegrating court of the Khan. Dynastic loyalties are shifting, petty jealousies lead to cold-blooded murders, and the long knives are coming out. Johanna's destiny – if she has one – lies with her grandfather, in Venice, at the very edge of the known world.
So, with a small band of companions, she takes to the Road – the Silk Road – that storied collection of routes that link the silks of Cathay, the spices of the Indies and the jewels of the Indus to the markets of the west. But first she must cross the roof the world, survive treachery, betrayal, and a Road beset by thieves, fanatics and warlords emboldened by the deterioration of the once all-powerful Mongol Empire.