When a group of Nationalists use an ancient artifact to bring a villain from Arthurian myth back from the dead to gain power, ex-monster hunter Bridgette McGuire escapes her retirement home and pulls her unsuspecting grandson Duncan, a museum curator, into a world of magic and mysticism to defeat a legendary threat.
Bad news comes in threes and so do the creatures haunting England—and if they’re going to survive this legendary fight, Gran and Duncan will need to revive a connection with an old enemy. After all, you’re always better with the devil you know…right?