The Little Ghosts, Henry, George, Lucy and Edward, are puzzled by the arrival of a blank piece of paper in an envelope bearing a tartan stamp. However, Lucy spots some instructions, and following them carefully, she makes a paper airplane. Realizing that this is no ordinary paper plane, The Little Ghosts are soon flying high above the lake, or is it a loch, and isn't that McGregor's castle in the distance? They end up sitting on the jetty enjoying a wee slice of cake to celebrate the birthday of a certain very shy Loch Ness Monster. Nessie, however, is nowhere to be seen, but wait: Who's taken a huge bite out of the cake?
