After being hailed as heroes for safeguarding Tristain, Louise Françoise and her familiar, Saito Hiraga, find themselves under immense pressure to continue protecting the kingdom. Following a fragile peace settling over Albion, Queen Henrietta must now navigate a brewing political turmoil. Amidst these turbulent times, a new malevolent force lurks in the shadows, threatening the Crown. To combat these mounting dangers, Louise and Saito must join forces once more. Shedding her title of 'Louise the Zero,' the young mage harnesses the formidable power of Void magic, capable of devastating a whole village. Yet, mastering these abilities presents its own set of hurdles. As conflicts escalate, the notion of prioritizing honor over self-interest is challenged, leaving them with a singular imperative—to persevere until the bitter end.