"We'll remain best friends forever." The promise made between four young friends were engulfed by the flames of war. During the Hundred Years' War in the 15th century, there was only one way to save a comrade fallen by the assault of the English army: bequeathing the the legendary alchemical substance "Philosopher's Stone" into the body to turn her into an immortal superhuman "Ulysses." The young Montmorency devoted himself to the forbidden research, when the fairy queen Astaroth appeared before him...

Montmorency arrives Domrémy Village in search of a way to become Ulysses. However, he became embroiled in a battle between the French mercenary troop and the English army for the control of the region... Young girl Jeanne suffers a fatal wound in the battle. To save her life, Montmorency inserts his precious Philosopher's Stone into her body. "Live through this, Jeanne!" The invincible Ulysses makes appearance before the tyrannical English army!

To escape the Church's inquisition, and to reorganize the weakening French army, Montmorency preaches Jeanne as a "female saint." Their destination is the relocated French Royal Palace. I will put an end to the war after reunion with old friends Charlotte and Richemont! However, Grand Chamberlain La Tremoille has other plans, and lays a series of cruel traps...

The royal family is shrouded in conspiracy. The scythe of death approaches Montmorency and Richemont as they fall for their traps. In addition, Jeanne reaches her time limit after a fight against an assassin hired by La Tremoille. They are in dire straits! Is there a way to save Charlotte, who has shut herself off from pressure and loneliness? On the other hand, Philip came to the castle to negotiate peace with France, but her father's phantom appears.

"She slept with the devil to obtain her superhuman powers!" A "virgin test" has been ordered upon Jeanne. Montmorency and party were cornered into a difficult position after sternly rejecting the test. Jeanne spills tears of torment. Montmorency promises to "be her side until death" to cheer her up. Unbeknownst to them, Richemont was watching from distance.