Lea and Xerxes go camping with their parents in the Australian bush one weekend and find a tunnel that leads them to a mysterious place full of big fish and strange islands They get stuck in their mysterious unknown place with no way back home 50 years earlier a boy named Dave, their same age, disappears without a trace while camping. Did he get stuck like them all those years ago? Could the kids find him while they try to get back home? As the kids work their way through several clues across islands, fight for survival up against bad weather, they learn how to survive. Time will tell if the kids are able to return home and if they find Dave.
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