Captain Stone's revenge

When a family friend, Grace, opens a sailing club on Lake Champlain at the former site of the Gemstone Islands Resort, Nancy, Bess, and George are invited to enjoy a few days of boating before the club's official grand opening. But when they arrive, they learn there have been some strange things happening on the property, from missing items to holes dug all over the yard. Is someone trying to sabotage the club, and could it have anything to do wi...