In the realm of Alcia, an individual's status and capabilities are dictated by their Count. Dropping to zero results in exile to the Abyss, a destiny considered worse than death. Hina, a wanderer whose Count fluctuates with her travels, is motivated by a vow to honor her mother's dying wish before the woman was dragged into the Abyss. To accomplish this goal, Hina hunts for the legendary Aces, warriors from a conflict three centuries ago distinguished by a white star beside their Counts. Along her journey, she meets Licht Bach, a mysterious masked figure with a negative Count, and Nana, a tavern keeper. When a military officer assaults Hina, Licht steps in to defend her, displaying a second Count bearing the white star to confirm his identity as an Ace. The narrative tracks Hina and her companions as they expose the concealed secrets of Alcia, the nature of the Abyss, and the enduring legacy of the Aces.