A young girl named Phoebe suffers from something called Deyab's Disease. It makes it hard for her to live a normal life and she resentful of that. She lives on the moon but doesn't get to enjoy it and she also loathes her step-mother. It's not until a mysterious girl who goes by the name of Unlua appears outside her window that Phoebe gets a chance to leave her room and also explore the moon.