Lost And Found

A girl who has hidden away from the world because of a serious danger now must venture out into the wild and ally herself with a notorious demon in order to stop an evil ruler take over every single city.
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Mia Evergreen and her sister, along with only friend, Cami, don't exist out in the real world. No one knows of their existence except for their mother, who has made a deal of sacrifices in order to keep them hidden. Out in the world of floating islands and different cities, there lies a new Advanced Land Association (ALA) leader named Famine. Unlike all of the previous leaders, she does not care about the well-being of the islands, and only cares about getting profit. She taxes everyone with no limits. If a family had one child, she would charge them per person. Same went for people with a giant family. The mother, who was already poor and could hardly afford the tax for herself, had no chance with her daughters. She, along with many other families, hid and shut them out from the world.
Famine realizes these tactics and begins to search houses, saying that hidden children will be shipped off to the most dangerous island, Diávolos, which means 'Devil' in Greek. On the day of the mother's search, they find the children, who are now fifteen. She keeps her promise and sends the frightened sisters out into the real world to the definition of hell.
In there, Mia and Cami meet the host of the party, Andi, who is as cunning as he is charming. The sisters, after pleasing him, make a deal to stop Famine in exchange for him to be allowed to travel away from his island. He will most certainly trick them many times, but they decide to give it a shot.
What will happen in this story of adventure? Will they eventually stop Famine once and for all? Or will Andi and his tricks get to the sisters before Famine's dire consequences do?