The Revolution

Esmaelynn Kroft lives in a futuristic world (no flying cars) with her best friend Roxxi Falcon and childhood friend Dmitri Farlaan. They used to live a life as regular schoolkids until the King (Dmitri's father) supposedly becomes corrupt, and Dmitri closes himself off more and more until he goes missing. At this point, everyone's more focused on hiding and surviving. Esmaelynn then meets Alia Lüx, who is the leader of a secret underground organization. She takes in both Esmaelynn and Roxxi, and helps them survive and fight the harsh conditions above ground.
But the question they've been asking was, why was this happening to their kingdom, and what really happened to Dmitri?