Piggley and his pals try to track down and trap a Fir Darrig, a particularly mischievous leprechaun. In the process, the kids accidentally break a window and decide to blame it on the Fir Darrig. Soon it begins to appear that the Fir Darrig is taking his revenge on them for giving him the blame - or is it just their guilty consciences? Lesson: It's always better to tell the truth.