Rhiannon Castle is a D'Anu witch whose Coven sisters know nothing of the Shadows that lurk within her. Rhiannon can't reveal the truth to anyone - least of all Keir, a rugged warrior soldier who walks into Rhiannon's life and awakens her to a wanton reckless desire...Keir's Tuatha D'Danann brethren are the only real family he has ever known. He trusts no one - until he is sent to San Francisco and meets Rhiannon, the one woman with fire enough to tame him. Every seductive encounter convinces Keir that she belongs with him - even though Rhiannon knows her powers could put him in peril...And then a new threat rises from the depths of the Underworld. When a demon goddess unleashes her evil upon our world, Rhiannon's secret could prove the ultimate weapon in this epic battle - or forge a pathway to destruction for the only man she's ever loved...