The thrilling conclusion to Sage and Ethan's journey that began in The Seer's Daughter. A town with a dark secret. A detective digging for the truth. A discovery that leads to an unthinkable sacrifice. For one hundred years, a demon has been watching, waiting, plotting… White witch Sage Matthews has inherited a gift that makes her both integral to an ancient prophecy and a target for a demon-possessed serial killer. Assigned to catch the killer, Detective Sergeant Ethan Blade falls wildly, and inconveniently, in love with the one woman he doesn't know how to protect. Together Sage and Ethan delve into the prophecy, and the more they learn, the more deadly their situation becomes. At midnight on the night of the blood moon, an ancient doorway will open, and a master demon and his horde will pour through and unleash hell on earth. Only Sage can stop their onslaught-but not if the demon kills her first. With the blood moon looming, Sage discovers she can join forces with "the alchemist's son" to destroy the demon. But who is the alchemist's son? And will he be willing to make the ultimate sacrifice required to end this struggle between light and dark forever?