The Secret World of Og

Four adventurous children—Penny, Pamela, Peter, and Patsy—along with their pets, embark on a quest to find their missing baby brother, Paul, who has mysteriously vanished. Their search leads them through a secret trapdoor into a peculiar underground world inhabited by green, mushroom-dwelling creatures who speak only one word: 'OG!' The siblings must navigate this strange new land to rescue their youngest member.