When Frankie stumbles upon an unopened letter from her late mother, she's delighted to have one last message from her... until she reads the contents and discovers the truth about her birth. Brimming with questions, she travels to York to seek further answers from the Mortimer family, but her appearance sends shockwaves through them all. As secrets tumble out and loyalties are tested, the Mortimers have to face up to some difficult decisions. Full of emotion and insight.