The people of the Champ de Printempts Kingdom, a kingdom that is very good to its commoners, live in fear because their country is targeted by Emperor Gioielle, the powerful and fearsome conqueror emperor of the Gioielle Empire. Meadow Sarcelle, a commoner of the Champ de Printempts Kingdom, thinks that she has nothing to do with the war effort in defense to the conquering, until she discovers a legendary sword one day and transforms into one of the legendary knights of legend along with a mysterious girl who transfers to her school named Crista Gioia. Now, Meadow and Crista, who transform into Knight Springfield and Knight Jewel, are considered the hope of the Champ de Printempts Kingdom against the Gioielle Empire's conquering.