When she was a litttle girl, Brenna Fallon naively invoked an ancient Celtic deity to save a beloved pet--and inadvertently anchored the new--found power to a spring on her family's farm, thus creating a door between two realities.
Years later, Brenna discovers the terrible potential of that gateway when a devastating plague unfolds abruptly around her. To survive, she must depend on her wits, a stranger she doesn't trust, and a mysterious stray dog who becomes more than just a faithful companion as Brenna struggles to drive back the threat of a modern Black Death.
Welded into one by a desperate sacrifice, woman, man and dog face the feral darkness together.
Extremely believable caracters, behaving in perfectly believable ways in an eerie situation. Top notch!