Gold

After a series of volcanic eruptions leave the world nearly buried in ash, twin brothers Esper and Starn are desperate to find a way to save their father from the harsh conditions he lives in working as a pollinator in Orchard Territory. The brothers find a map hidden by their deceased sister that points to nearby islands rumored to have gold. The boys set off on a glider that Starn designed for the trip, but it's not smooth sailing for the brave duo.