Less than a decade after the great potato famine in Ireland, a political refugee from Japan arrives on the shores of this impoverished and hurting nation. Akemi lands almost in the arms of Paddy O'Brien, the day after he finds his mother killed in mysterious circumstances. He doesn't know it, but Akemi is the Mapmaker's Daughter, and the Japanese Shogun will do everything he can to get her back. Can Paddy protect Akemi from the ruthless pirates who have been commissioned by the Japanese shogun to bring Akemi back home? Jun, a transgender pirate who has lived so many places she has nowhere to call home, may ruin everyone's plans. Except her own, if she can help it.