In a world ravaged by the effects of climate change, sixteen-year-old Joe has been left with nothing but mountains full of junk and a community of fellow scavengers. Conditions become so harsh on the landfill mountains that he must travel to the faraway city in search of a cure for Lily, a six-year-old left deathly ill from an avalanche of waste. On the way, he discovers a hidden world brimming with storytelling magic.