Somewhere in the world, there is a workshop owned by a an inventor named Doc and his Dog, Sprocket. While Doc spends his days coming up with new ideas, Sprocket is peering into a large hole in the baseboard. He knows that something lives behind the wall. Through the hole and down the tunnel, hidden from everyday reality, are brightly lit caves filled with wonderful creatures. This land, bound together by Magic, is called Fraggle Rock. The most notable of the creatures who inhabit this beautiful place are the Fraggles.

Fraggles are furry, have tails, and come in all sorts of colors. The Fraggles spend their days laughing, splashing, running, singing, playing games, and telling jokes. They live by a simple care-free code:

"Dance your cares away,
worries for another day,
let the music play,
down at Fraggle Rock."

Note must also be taken of the Doozers. Doozers are hard-working, little green men, who spend their days building intricate Doozer constructions. The Doozers have built their towers to be pleasing to the Fraggles' taste buds. If the Fraggles didn't eat the buildings, the Doozers would quickly run out of building space and would have to move on.

On the other side of Fraggle Rock, there is a hole leading to the realm of the Gorgs. The Gorgs are large and hairy giants who think they rule the universe. Their garden; namely the Radishes, are the Fraggles' only source of food (aside from Doozer towers), so every day or so, the Fraggles must emerge from the Rock, and steal food from the Gorgs. This drives the Gorgs crazy, and whenever they see them, they try to catch or thump the elusive Fraggles.

Just beyond the Gorgs lies the all-knowing Marjorie, the Trash Heap. When the right ingredients of coffee grounds, banana peels, and tin cans came together, this pile of garbage suddenly came to life. The Gorgs don't know that she is alive, but the Fraggles make the dangerous journey across Gorg territory to receive her wisdom.