In a race with hot air balloons, F&F are tricked by a pair of crooks, but in the end they are the laughing stock. The children are chasing mean dog catchers. Knox takes F&F on a journey into the earth's interior, where they are surprised to encounter a beautiful cave and a strange race that they rescue from a cyclops. Makiki meets a cute cat, but she doesn't let him tell her anything and has sharp claws. Even the children and dad are powerless; then comes mummy.