Jenny makes friends with the ghost of a young boy who guards a pile of rocks in the Irish countryside, and converses with the puca, a spirit disguised as a white ghost. The daughter of J.J. Liddy, who traveled to the timeless world of T'ir na n'Og when he was a young man, Jenny feels dreadfully out of place in the human world. When the enemy finally reveals itself, the future of the human race is under threat. Suggested level: intermediate, junior secondary.