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With a mysterious cloud spreading across the land making the country and its people sick, two groups of kids join forces with a mysterious unspeaking girl to try to save the world.

The kids meet a strange man sitting in a box who tells them that if they want to know more about the cloud they'll have to ask the Man Up A Tree, but first they'll have to get him down!

When Hudson, Em, Vinka, Noodles and Lali find themselves trapped in a strange schoolhouse presided over by an ancient principal, it falls on Samara and Keile to try and rescue them.

When the kids encounter legendary outlaw stockman Random Dan and his sidekick Big Joey bogged in the middle of a salt flat, he offers them something special if they help dig them out.

When the kids find themselves at a pass blocked by the Shadow Boxer they have no choice but to find another way around.

The kids make camp at the base of a spooky looking hill and get their food bag out for dinner - only to find the food gone!

The kids meet an Aunty making damper in her shack on the beach. As the bigger kids set up camp nearby the littler kids stay to listen to the Aunty yarn - it's been years since she's had anyone to talk to!

While Hudson and Em stop to pick some bush lollies, the others go on, and find themselves in a valley where they are hemmed in and tied up by two bigger kids, who take their compass and cart.

Vinka is too sick to keep walking. The kids stop so she can rest, but she needs food. Hudson, Samara and Keile offer to walk on up ahead to see what they can find.

The kids now have all eight special stones, and Hudson is convinced he has the key. The kids encounter the Nannas, who tell them that if they are to win, everything is going to need to be in its right place.