Mary, a princess deemed a failure because of her inability to use magic, is faced with an arranged political marriage. Despite this, she remains optimistic about finally being useful as a member of the royal family. However, a turn of events at the unveiling party of her fiancé leads to her arrest and wrongful sentencing to execution. Her own family even betrays her, leaving her with no allies except for her older sister. Tragically, both sisters are killed by the most powerful magician, the "Arcana User", as they try to escape. As Mary lays in a near-death state, her powers awaken. She gains the Arcana of "The Death", which grants her the ability to eat corpses and boost her strength. With her newfound power, Mary vows to get revenge on those who were responsible for her sister's death. This story is based on a web novel by Kiki.
