Bearing an uncanny resemblance to the now blind displaced King of the Scots, former gladiator and slave Phaedrus impersonates the Horse Lord to regain from the Picts the control of the Scottish kingdom.

If only she'd been born a boy, Tamsyn would never have been sent away to Uncle Gideon's - the armourer's - house when her grandmother died. She could have stayed by the wild sea that she loved with her Uncle Martin, the ship merchant.

But instead, she is bound for busy, bustling Tudor London, and the armourer's house, far from the coast and far from her beloved ships. Homesick and lonely in the loud family of cousins, it isn't until she meets the strange old Wise Woman that Tamsyn is finally promised her "heart's desire"...