Dolwyddelan Castle, North Wales, 1896

Not all history was meant to be found.

Snow lies deep around Dolwyddelan Castle.

Within its walls, a small and carefully chosen company has gathered to witness the unveiling of a newly discovered medieval codex — a manuscript said to unsettle the accepted history of Wales and the English Crown.

By the early hours of Christmas Eve, something has occurred.

No one can fully account for it.

The manuscript has vanished.

Professor Owain Morgan is asked to look beyond what can be seen, and into the minds of those who remain. In a place where evidence is fragmentary and testimony uncertain, he must attend to the deeper patterns of thought and behaviour, to fear, to pride, and to the quiet workings of conscience.

As the storm tightens its grip on Dolwyddelan, silence settles over the castle.

What lies beneath it is not easily brought into the light.

The historical background can be found in Notes.