Nanoha Takamachi was supposed to be an ordinary third grader, but everything changed when a chance encounter with Yuuno bestowed her with magical powers. It’s been a little over six months since that day and the Precia Testarossa Incident—a battle over otherworldly artifacts known as Jewel Seeds. After numerous confrontations with Fate Testarossa, Nanoha’s efforts to reach out to her rival sparked a close friendship between the two. Nowadays, Nanoha’s living the quiet life with her friends and family. However, a new battle erupts when the forbidden Book of Darkness is flung wide open. With Fate and the Time-Space Administration Bureau working beside her, Nanoha discovers that a girl named Hayate Yagami holds the key to this crisis. Acting with courage burning in her heart, Nanoha desperately reaches out into the unknown to forge another connection.