Olivia and her sister Georgia are looking forward to a Cornish holiday filled with sand, surfing and fish and chips. Instead, soon after arriving at their seaside cottage, the girls stumble across a crumbling old smugglers' tunnel hidden behind a wall. They venture inside and start exploring deep underground. Transported back in time, they find themselves in the thick of a magical and dangerous adventure. Their world collides with the smuggling era of the 1700s when they meet Joey, a boy who's in a lot of trouble and needs their help

This exciting tale will delight all children...