Eurasia depicts the story of Wenceslas Jr. the prince of the Czech Dukedom who sets off on a long and difficult journey to the Empire of Song. He escorts Dinghui, the mastermind of the mysterious Map of Battle Formation, and his daughter Xiaolian back to the Czech Dukedom. On his way, the prince and his comrades, fight the Mongolian assassins, who are led by general Bo’ertai. Ultimately he saves his motherland from the Mongol onslaught.