A few days have passed since the heated battle against Silver Storm, but Noir still has not returned to her normal self after transforming into Mystere. Kanata takes Mystere to places where he and Noir shared memories in the hopes it will help wake Noir.

Mystere tells Kanata that Histoire really does exist. As proof, she and her former master had once made contact with Histoire's network during their travels. However, if Kanata is ever going to make it to Histoire, he will need to undergo some training.

Kanata heads to nearby Carthago, which supposedly has an old spaceport, in his search for clues to the legendary Histoire. He tries to gain access, but is suddenly attacked. When he confronts the attackers, Kanata is challenged to a duel for his Magus.

Noir learns her personality may disappear once Mystere's self-repair sequence is completed. She accepts her fate, believing Kanata is better served with Mystere at his side. Hearts misalign as Kanata is unaware of her decision. As a final gesture, Noir decides to make him a meal.

Noir's reckless behavior causes both her and Mystere to stop functioning. When neither will wake up, Kanata turns to Alba for help. However, Alba tells Kanata he will need another Type Zero Magus in order to save them. There might be one in the ruins of Amasia, so Kanata and Ciel set out to find it.

Betrayed by a trusted ally, Kanata is taken prisoner. To make matters worse, two more of his friends are seen standing among Ideal's members. With a final twist of the proverbial knife, Weisheit reveals a shocking past.

Ellie comes looking for Kanata, fearing for his safety. She finds him in a state of shock, cradling a motionless Ciel and blaming himself. Time is running out for Noir and Mystere, but he still cannot make a choice. Amidst a heated debate, Kanata must come to a decision.

Pascale left a message detailing Noir and Mystere's past. It was a story that began when they first made contact with Histoire. Meanwhile, Macht reminisces about the time he entered into his contract with Schnee...

With the battle against Ideal on the horizon, Kanata is busy enhancing DAISYOGRE ALTER. Meanwhile, Noir still cannot accept that Ciel was the one who saved her. Wandering around, she comes across one of Ciel's fans. As the two reminisce over Ciel's songs, Noir tells Kanata she wants to try singing.

With Maria's rocket completed, Kanata can finally travel to Histoire. However, Ideal has other ideas and tries to stop him. It is open warfare as Weisheit orders Macht to steal Mystere from under Kanata's nose. The battle between the Drifters of Rock Town and Ideal starts with a massive bang.

Kanata decides to chase Weisheit down in the last remaining rocket to get Mystere back. He and Noir say their goodbyes to the people of Rock Town before finally arriving at Histoire, where Weisheit is eagerly waiting for them.

Everything went just as Weisheit planned and every Magus has ceased functioning. However, Noir is the only Magus unaffected due to her unique origins. Now all hope rests on her shoulders. The time has come for Kanata and Noir to face off against Weisheit in their final battle.