Darius Alwyn is a Realm Walker sifting through time, dreams, and reality to maintain a balance between good and evil. He broke the rules when he saved a young woman from a natural death in 1758. Teagan Alexander lives a complacent life, freelancing as a travel writer with no ties or troubles until she stumbles into mayhem at a Scottish festival. The stranger who intervenes declares he has protected her for nearly three hundred years and warns that her life is in danger. To rectify old transgressions and crimes against nature and time, Darius and Teagan must navigate the past and very real threats. Between the connection they have to one another and those who want Teagan dead, they are in a desperate race against time to save their lives.