Bill and Allison are going on a cruise around the Channel Islands for their honeymoon. But Sir George orders Bill to drop everything in order to get on the trail of Slade - a villain. Allison is devastated. The children suggest that they go on the cruise with her instead. But when Lucy-Ann buys an Galley ship in a bottle that Slade is looking for, the children find themselves in terrible danger. (thetvdb.com)