Mr. Gronkle is fed up with his ancestral castle which is falling down, so he decides to tear it down and build a modern shopping center in its place. The cat family finds out and they start a petition to save the castle, but it's Gronkle's own nephew who saves the day when he reminds his uncle about how a much fun the young Mr. Gronkle had picnicking around the ruins with his own parents. (thetvdb.com)