Ralph X. Trevelyan, is a single, 28-year-old, self-employed genealogist - better known by friends and colleagues as Xero, due to his Zero amount of unsolved cases and his renown as a researcher.
No case is too difficult for him. If fellow researchers can't solve a case by the crucial 'Zero hour', that means it's time to contact Xero!
While going about his everyday activities, something peculiar and extraordinary happens to Xero, which has a significant and positive bearing on his genealogical cases. Some mysteries are unravelled, and tough decisions and much moral justification is needed. Although much is revealed, there are forces that he can't control... or can he?