Time is running out for Rónán and his psychically-linked twin brother, Darragh. In two weeks, at the Autumn Solstice in their own reality, the Queen of the Faerie will transfer the Undivided power to the new-found heirs and the older twins will die.
But Darragh is trapped in 2001 Dublin and Rónán in a reality where the Undivided are not Druids, but Shinto warriors. The twins need to get home before the transfer takes place - not only to save their own lives, but to break the curse on Trása, who is destined to remain trapped by Marcroy Tarth's spell, and to rescue Hayley from the Faerie Lord's seductive embrace.
With Darragh caught in a reality without magic, and Ronan stranded in one with plenty of magic but no idea how to use it, the brothers must prove that even across realities, they truly are the Undivided.