When Rare Unique chose to give up her life and slit her wrist, she woke up only to find out that she is now a grim reaper who is tasked to pick the soul in her hometown, Grimwall, with her partner, Dawn. Determined to know the secrets and lies of the people who pushed her to oblivion, Rare Unique and Dawn seeks the truth by living inside another's body only to find out the truth and darkest secrets behind the tall wall of Grimwall City.