The seaside village of Smugglers Cove is proving to be anything but quiet for the four children as they encounter yet another mystery while exploring Brackness Castle. This ruined fortress sits on the outskirts of the village and, as the children soon discover, holds more secrets than they could ever imagine.
Who is hiding in the dungeons? What is in the bag? Where does the secret tunnel lead to?
Set in 1950's Britain, this adventure story will suit people who enjoy Nancy Drew, the Hardy Boys or the Famous Five.