Descended from an Irish demigod, Brianna has fled to Ireland to escape destruction at the hands of her sworn enemies, the Sons of Killian. Taking refuge at the estate of her former nemesis, Austin Montgomery, Brianna discovers a rift in time that opens to an era before the feud began.
Wrestling with her newfound feelings for the more innocent Austin, Brianna begins to wonder if she can alter the past. But when Brianna and Austin learn that the Sons are raising an army of mythical beasts, the pair will need to use their magical strength in the present to avoid a tragic end.