Jack and Annie travel back to nineteenth-century Ireland to inspire a young Augusta Gregory to share her love of Irish legends and folktales with the world.

In his sixth adventure, something sinister is afoot in the house in the west of Ireland in which young Sherlock is staying.

In the coal mining region of mid-nineteenth century eastern Pennsylvania, Phin witnesses a murder and runs for his life, pursued by a mysterious man and a horse with the instincts of a bloodhound.