Despite carrying the scars of childhood trauma, Mary McAllister has enjoyed a successful career and become the mother of two wonderful children. Then their deadbeat father leaves, her young daughter dies, and she is hospitalized in a psychiatric center as she seeks to recover from this devastating loss. But she is not the same when she is released—and during escalating periods of crisis, she claims to be possessed by Z-DA, an evil creature from a distant galaxy that has come to earth in a war almost as old as the universe itself with Ordo, leader of a good species.

Is this real, or only extreme psychosis? Is Mary's young son, Billy, really Theus, the First Lieutenant for Ordo, as she increasingly believes? Is Billy's dead sister, Jessica, really reaching out to her brother for help in freeing her from the dark and distant place where she is trapped? As a city is engulfed in mayhem, events race toward a stunning conclusion in Traces of Mary, a one-of-a-kind mix of horror, science-fiction, thriller and mystery by best-selling author G. Wayne Miller.