There's no way to describe Jack Bluestone except "normal". He's never left the Overworld, and knows no other life besides his own uneventful one. His village is a small place where nothing ever happens... until his reality is turned on its head by the girl who falls from the sky. The girl with a pair of elytra and brilliant purple eyes. Who is she? And who sent her here?

Ellegaard, who is having a trouble that she is feeling weak, can't control herself and instantly kill one of her friends but she's innocent. She tries to leave her friends alone to keep them safe from herself turns to madness. The reason is she has someone in her body, who is mad at something before that happens: just kills people. So her friends tries to find the way to stop it.