The movie opens with a familiar scenario: Tony Hale plays a dad raising his two kids, Amber (Bianca Belle) and Jack (Kue Lawrence), after their mother’s passing. His sister, Liz (D’Arcy Carden), is helping them sell the house, which creates some friction when Amber's unsettling artwork surfaces at school. Luckily, her teacher encourages sketching rather than acting out those feelings, providing her with a notebook to secretly record her thoughts about family, classmates, and grief. Meanwhile, Jack discovers that a local pond seems to have unusual powers—first, he tries to fix their treasured pizza plate, then, inevitably, something more significant gets revived. His sister steps in at that point, but her notebook accidentally falls into the water, which brings her vividly drawn imaginary creatures to life. These creations then begin to wreak havoc on the town and its residents, including the bothersome Bowman (Karon Cox), who must all figure out how to stop these colorful, multi-limbed beings from spreading uncontrollably. The adult performances are adequate, but ultimately this is a film driven by the three children as they use their fantastical enemies to confront their emotional struggles, relationship problems, and inner demons. There’s some sibling squabbling throughout, but once the conflict begins, it's about teamwork while battling these sometimes frightening adversaries. A fairly straightforward message emerges regarding how we process sadness and the risks of ignoring those feelings, all while the animation blends effectively with the live-action elements and there’s a good deal of playful chaos along the way. It’s refreshing to encounter a film that has something meaningful to offer, and this one is unique in its approach. It's definitely worth seeing.

Source on TMDB