In Carmon Kingdom, a medieval fantasy land where humans and monsters live side by side, the Monkart Race is the most popular sport, and whoever ranks highest can be chosen as a knight. Twelve-year-old Jin of Latona Village dreams of winning it one day. Then Destro, commander of the knights, invades the kingdom and tries to force a marriage with Princess Sena. Sena escapes and runs into Jin, and their meeting awakens Draka, a dragon monster sealed inside Jin's sword. Together with their monsters, Jin and Sena set out on an adventure to save the kingdom in this action fantasy short series.