The girls learn that the remnants of the Noir Rod have taken control of a nuclear missile that threatens to destroy the country Great Britain is currently in conflict with due to Croix's machinations. Unable to stop it by conventional means, Akko and her friends bundle their brooms' power with the Shiny Rod's magic and chase after it! Can Akko and Diana stop the missile in time?
Akko comes to Ursula late at night to ask her about Chariot's disappearance, but doesn't get much help from her. In her studies, Diana discovers that his ancient power is sealed in Arcturus Forest, and can only be released when the Shiny Rod activates seven ancient words. Akko takes the Shiny Rod with her to a place known as the Blue Moon Abyss. Reaching the center of the abyss, Akko confronts the spirit, who offers to grant her dream of being a great magician like Chariot in exchange for her past memories.
The Luna Nova students begin taking broom flying lessons. Despite being unable to even get off the ground, Akko becomes eager to enter the school's traditional broom relay event after learning Chariot was one of the winners. Later, Akko goes with Lotte to a magic item café where they come across a legendary broom known as the Ryuuseimaru (Shooting Star) that has been sealed off for being too temperamental. Interested in the relay's prize offerings, Lotte and Sucy decide to help train Akko to try and ride her broom, and on the day of the relay Sucy uses her concoctions to give her team an early start and Akko an alternate means of using her broom. Meanwhile, Amanda O'Neill steals the Ryuuseimaru to use for herself, only for it to break loose and run wild, soon running into Akko. Despite being dragged around the world and shaken off, Akko manages to take ahold of the Ryuuseimaru and go neck and neck against Diana, only to fall off again when it breaks its seal and flies away, leading her to place second in the relay.
Learning from Ursula that history and tradition are the clues needed to unlock the Shiny Rod's fifth word, Akko and Amanda sneak into Andrew's school, Appleton Academy, where a relic known as the Holy Grail is being kept.