Nanoha is ambushed by Vita for her Linker Core.

Nanoha and Fate fight the much stronger Wolkenritter.

Raising Heart and Bardiche demand a new and dangerous modification to their design.

Hayate's condition worsens, and the TSAB corner the Wolkenritter.

A masked man appears to help the Wolkenritter, whose artificial nature is revealed.

Hayate's love has given the Wolkenritter emotion, and though she says not to hurt anyone, they ignore this in order to protect her.

Fate and Nanoha again confront Signum and Vita, trying to get them to open up.

Nanoha and Fate meet Hayate, and the TSAB realize that the Book of Darkness is going to kill her.

While Chrono researches Graham, the masked man- well, two of him- complete the Book of Darkness at great cost and frame Nanoha and Fate for the crime.

Hayate is engulfed by the Book's power. Chrono confronts Graham on the past and gets a new weapon.

Fate faces her dreams up against reality, while Nanoha battles the Book of Darkness.

Although the danger is averted, the threat to Hayate's life remains. In view of this, Reinforce makes a fateful choice.