Rainbow, an exuberant 12-year-old vlogger, sets out on a journey to Hell City — a tourist resort run by the Devil’s son — in search of her long-lost father. She travels in an old ice cream truck with her brother Alek, a melancholic musician and her complete opposite. Along the way, they discover that their father traded his soul to the Devil in exchange for success. But reaching him — and returning home — proves far more complicated than they expected.