Natalie Brandon has a secret. Diagnosed with schizophrenia, she's tormented by a recurring hallucination, the voice of an angel named Belial. The voice tells her things no one knows, but getting someone to believe her is next to impossible, thanks to her diagnosis. Even her sister Beth, a history professor and Natalie's guardian, doesn't always believe her. Follow Natalie as she unravels historical mysteries with Belial's help. From the long-lost Romanov fortune to the relics of a French saint, Natalie searches for things no one else can find - and has to outsmart hit men, con men, terrorists, and Belial just to survive.