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June is a girl with a fascination for adventure parks. At home she creates together with her mother and her imagination her own park, calling it Wonderland.
One day, while taking a shortcut trough the woods, she bumps into a roller coaster car that transports her into her Wonderland. There she meets the mascots Greta, Boomer, Gus & Cooper, Steve and Peanut.
As the wonderchimps have turned into chimpanzombies and now are destroying the park, June and the mascots must work together to safe wonderland.