Flam, a girl, is chosen to be a part of a journey to defeat the demon lord, as foretold by God. The hero party consists of top-tier individuals, but Flam is the only one without fighting abilities, with all her stats at 0. Despite this, she strives to help the heroes. One day, she is betrayed by a party member and sold to a slave trader. As a slave, she encounters a cursed sword and discovers the true value of her weakest ability, "Reversal." Gaining fighting strength, she decides to live peacefully as an adventurer with a fellow slave girl, no longer caring about the demon lord. This is the story of a girl's struggle to reclaim a peaceful life from rock bottom.