The angel Eugene descends to the human world in search of the "Ring of the Recorder," an artifact containing the records of sinners, which has been stolen. His investigation leads him to a pub called "White Demon," where he encounters the demon Ruth, believed to be the culprit. Eugene strikes a deal with Ruth: if Ruth grants him three wishes, the ring will be returned. However, Ruth's melancholic demeanor and cryptic question, "Don’t you really remember me?", leave Eugene unsettled, hinting at a forgotten past connection between them.