When handsome, charming Venetian Marco Polo (Cooper) travels to the luxurious court of Emperor Kublai Khan, he intends to find oriental treasures. What he doesn't intend to find are the emperor's beautiful daughter (Gurie) and a plot to overthrow the throne by Khan's evil aide, Ahmed (Rathbone). Sent away into dangerous barbarian lands by the scheming Ahmed, can the dashing adventurer fight his way back in time to save the emperor and win the heart of the princess?