After a life of lies and mystery, Thomasine Forest has fled to the fairy realm of over there. She's been there for four years, living with a mixed community she knows as the clan. Although she enjoys her life with them, she can't commit to marrying her lover, Cornelius, because she knows she will eventually return to the human realm to resume her life with her human boyfriend, Dequan.

It's still too soon to return home, so Thomasine embarks on a journey that takes her from the leprechaun village of Balla Cloiche to board the ship Unicorn of the fair wind fleet.

Landing on the Island of Summer brings new adventures with two courtfolk men, as well as the realisation of a long-held ambition to go horse-riding. After leaving Summer, Thomasine experiences a sojourn on a magical island and then, by degrees, she makes her way back to Balla Cloiche. She can go home now, but first, she intends to catch up with her beloved clan. Thomasine knows her life is about to change enormously. For one thing, she won't be Thomasine anymore. It's time to leave the fairy realm and resume her life as Tamzin Herrick.