Nanoha (voiced by Yukari Tamura) was originally an ordinary third-grade elementary school girl, but because of an unexpected encounter with Yuno from another world, she became a magical girl and was thrown into the battle for the inheritance. After the last incident, Nanoha bid farewell to Fate (voiced by Nana Mizuki), with whom she had a deep friendship, and returned to her peaceful daily life, receiving magic training to guard against the next round of fierce attacks from the enemy. One day, a mysterious magic barrier appeared in the sky above Haiming City, and this unusual phenomenon attracted Nanoha's attention. Sure enough, Nanoha was attacked by the red-haired magical girl Vita (voiced by Asami Sanada). What Nanoha didn't expect was that Vita actually destroyed Nanoha's solid defense at once. Fortunately, Fate appeared in time, and Nanoha survived, and the appearance of Vita meant that a conspiracy was secretly unfolding.