Hedley and Marvin eavesdrop on a conversation between Grandfather and Mr. Watson. Hedley’s quills quiver when he hears the humans planning a visit to an abandoned fort. Anxious to be on a new adventure, Hedley and Marvin stow away in the back of Mr. Watson’s car. While sniffing around for clues, Hedley tumbles headlong into an abandoned pit and Marvin is cornered by their old enemy, Jackdaw. Follow their adventures with a mysterious wizard, who entrusts them with a precious secret.

This is the third book in the trilogy of The Adventures of Hedley the Hedgehog.