A kid watches her Cocotama guardians work as actual gods, learning that saving something broken matters more than buying something new. The movie doesn't preach about consumption; it shows you why a person would fight to keep an old toy alive. Tepple's stowaway desperation grounds the whole thing, this isn't about teaching kids to recycle, it's about the ache of letting go.
Kokoro and her school friends organize a bazaar to give forgotten household items a second life, but the real adventure begins when she's invited to the Cocotama World, a magical realm where guardian spirits watch over human hearts and treasures. There, Elder Tama reveals a troubling truth: people are discarding their belongings too carelessly, and the Cocotama need Kokoro's help teaching humans to cherish what they own. The problem intensifies when Tepple, one of Kokoro's mischievous Cocotama companions, accidentally steals a crucial key acorn from the Happy Tree, the source of all magic in their world. Without it, the balance between human emotions and Cocotama power begins to collapse. Dark mushrooms sprout on abandoned items, born from the sadness and regret of forgotten things. Kokoro must work with her Cocotama friends to retrieve the stolen acorn and restore harmony before the magic fades completely. It's a story about recognizing the emotional weight of objects we own and learning to treat them, and each other, with care and respect.