13 year old Mel Taverner is carried away by dreams of treasure and adventure when she learns that an old map she has bought is a Caribbean island. She persuades her father to take her and her twin brother Rob on a sailing holiday to try and find the strange island. But as they bask in the Caribbean sunshine they do not know the true significance of the map nor the dangers it will lead them into … Can Mel uncover the secrets of the Island of Spirits?