The plot follows a young girl who encounters a real version of her magical amusement park run by anthropomorphic animals.

The film was directed by former Pixar animator Dylan Brown in his directorial debut; while he was involved through most of the production period, Paramount Pictures dismissed him in January 2018, citing "inappropriate and unwanted conduct".

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.

There, June finds Peanut hiding from the Darkness where he confesses he felt lost after he stopped hearing the voice in his head.

After noticing the piece of the blueprint and realizing that she has been able to create the ideas for the park herself, June fixes one of the attractions to catch up with the animals and make it to Clockwork Swings.

She promises him that she will provide the voice for his imagination and that he should not let the Darkness take over him, giving him an idea to make a slide out of bendy straws to escape.

While the gang and Peanut are riding the slide to avoid the Chimpanzombies, June then notices that Clockwork Swings is attached to her name written in cursive, just like the blueprint piece.

With Peanut's help, they get Clockwork Swings back up and running by using her name to move the gears, and clear up Wonderland from the Darkness.

[citation needed] Wonder Park started development in early 2012, with the story being written by Galaxy Quest and Lemony Snicket's A Series of Unfortunate Events writer Robert Gordon[13] and production commenced in September 2014.

[18] In January 2018, it was reported that director Dylan Brown was fired from the production by Paramount Pictures, following an investigation into complaints of "inappropriate and unwanted conduct".

The website's critical consensus reads, "Colorful and energetic but lacking a compelling story, Wonder Park is little more than a competently made diversion for very young viewers.

[34] Although a trailer for the series, Adventures in Wonder Park, was attached to the Blu-ray release of the film, there have been no updates from Nickelodeon on the project since.

A sizable collection of unfinished episodes, including animatics, storyboards and scripts, were posted online around December 9, 2022.