“A corrupt soul is the most delicious.” Lieutenant Ashe Shevelowski is the commander of the 13th guard and a sister for the holy church in the Kingdom of Helvetia. Although her outward appearance is that of a child, she is a mysterious, mythical existence known as a Soul Eater whose “work” permanently engraves itself into her body with each bloody bite she takes. Will fate remain on her side or will it be working against her?