Ollie lives in a busy city with her parents and half-sister Nim, who has Downโs syndrome. While Ollie loves Nim, it often feels like a responsibility. At their grandmother Antjeโs 75th birthday, they plan to perform Nimโs favorite song. When Nim panics about her forgotten elephant headband, she runs into the woods, and Ollie chases her. They get lost but face enchanting challenges together.