In Korea in 1473, eleven-year-old Young-sup overcomes his rivalry with his older brother Kee-sup, who as the first-born son receives special treatment from their father, and combines his kite-flying skill with Kee-sup's kite-making skill in an attempt to win the New Year kite-fighting competition.

In thirteenth-century China, after trying to save his widowed mother from a horrendous second marriage, twelve-year-old Haoyou has life-changing adventures when he takes to the sky as a circus kite rider and ends up meeting the great Mongol ruler Kublai Khan.