An annual ghost hunting event, known as the Wild Hunt, is coming to Blytonbury for its final stage. After accidentally breaking one of her robots, Akko offers to help silent tech genius Constanze, who is participating in the hunt by invitation from Professor Croix. Constanze is reluctant to let Akko help her as she prefers to work alone, but Akko soon manages to prove herself useful by helping Constanze gather the materials needed for the battleship she intends to use for the event.