When Piggley misplaces Mr. Hornsby's special shamrock, he retraces his steps with his friends in order to find it in time for their report about Ireland on St. Patrick's Day.
I just didn't care for this book. The characters did not appeal to me, and the story seemed to ramble. It did teach the lesson of working back to where you first lost an object, when trying to locate something you have misplaced.