Tweens Jeremy and Joshua are visiting their grandparents. When their parents are kidnapped, they are told to find a legendary blue diamond. That's when their grandparents reveal THE WATER DOOR—a secret hydro-portal that transports them to the distant planet Tetherae. Once there, they embark on an exciting adventure through the wilds of the medieval planet, which includes fierce dinosaurs, enormous giants, deep caverns, and mystical castles. Using their new special abilities, they must find the diamond before it's too late!
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