June Bailey, a young imaginative girl, and her mother come up with the idea of Wonderland, a magical amusement park run by a group of anthropomorphic animals: Boomer, a big blue bear who greets guests; Greta, a wild boar; Gus and Cooper, beaver brothers; Steve, a porcupine who is the park's safety manager and is in love with Greta; and Peanut, a chimpanzee who is the park's leader and has the ability to create rides by listening to June's mother's voice. Over time, June's mother starts to get sick and is sent away for recovery. As a result, June starts alienating from Wonderland and burns the blueprints of the park out of frustration.