Nangong Jiyu, a special forces soldier, sacrificed his life to protect a child during a peacekeeping operation. Reincarnated after death into a world of swords and magic, he became a newborn named Tyr. When he was eight years old, a squad of knights clad in exquisite armor arrived at his home. Tyr learned that his family belonged to the high nobility—specifically, bearing the bloodline of House Callis, one of the empire's five Grand Dukes, known as the Grand Duke of the Sword. The reason for their arrival: the latest Grand Election was about to begin. All eligible children of House Callis were to be gathered and sent into the Sword Prison for training, from which the successor to the next Grand Duke would ultimately be chosen. Tyr: "So the position of Grand Duke Callis doesn't simply pass from father to son?" "Everything must be seized with the sword in your own hands?" "If that's how it is... my blade is sharp as well."