Hay-On-Wye, 1400: War is brewing in the Welsh borders. For two hundred years, the Welsh people have lain under the English yoke, dreaming of independence. In the walls of Sleeper's Castle, Catrin finds herself caught in the middle of a doomed war. Hay-On-Wye 2015: Miranda has moved to Sleepers' Castle to escape and grieve. But every time she closes her eyes she dreams vividly and makes a connection with a young girl, who's screaming, who's reaching out... who only Miranda can help. Is she losing her mind?