When a long-term attack against her world by the alien Krell escalates, Spensa's dream of becoming a pilot may come true, despite her deceased father being labeled a deserter.

"All her life, Spensa has dreamed of becoming a pilot. Of proving she's a hero like her father. She made it to the sky, but the truths she learned about her father were crushing. The rumors of his cowardice are true--he deserted his flight during battle against the Krell. Worse, though, he turned against his team and attacked them. Spensa is sure there's more to the story. And she's sure that whatever happened to her father in his starship could...