Because of a mistake by a goddess-in-training, Jiang Ling died in her original world. To make it up to her, the goddess promised to grant her three wishes and reincarnate her in another world. But after reincarnating, instead of the new life she'd expected, she was locked up and turned into a lab rat. At the brink of despair, a hero from the Throne of Heroes answered her summons and descended into the present world. She thought it would be an ordinary Holy Grail War, but when Jiang Ling saw the twenty-one Command Spell marks on her chest, she realized things weren't as simple as she'd imagined.
