A young Venetian, Marco is abandoned by his father for the merchant Silk Road in the hands of the Mongolian emperor, Kublai Khan, who is at war with China. Kublai recognizes Marco's observation skills, and teaches him the Mongolian culture.

Marco learns more about the culture that surrounds him and things of trade like linen, spices etc while also learning more on Asian combat which he puts to good use.

Kublai mourns the loss of his brother. He doesn't show at feast held in his honor by Kaidu. Mei Lin finds a way to get closer to Kublai. Marco gets close to Khutulun, Kaidu's daughter. Marco fails to find the man, who is receiving jewels from Kokachin.

A war looms with the walled city of Xiangyang, Prince Jingim tests his diplomacy skills while Kublai questions Marco's allegiance.

Marco searches for the mastermind behind a murderous plot, while Prince Jingim weighs the risk of retaliation.

On the eve of an auspicious ceremony, Marco searches for the culprit behind the assassination atempt of Kublai Khan - even as a new one takes shape.

Marco and Hundred Eyes take on a dangerous mission to infiltrate the walled city of Xiangyang, while its chancellor struggles to hold on to power.

When Kublai sets his sights and his army on taking the walled city of Xiangyang, Marco's allegiance is tested.

Marco's ingenuity and loyalty are tested again when the Khan makes the violent decision to become emperor of the world; Marco must then make a decision.