Something is happening to young Bella's world that she doesn't understand.
From the time she was small, she had dreams of ships in the sky and visitors in the night. Because she and her brother loved to watch science fiction, it made sense. But, as a teen, she wakes up in strange places, not remembering how she got there. Even worse, she has huge segments of time where she seems to wake from a trance, adding to the mysteries locked in her fractured memory.
Now her family is acting strangely, and she must navigate a home life that is suddenly feeling very foreign to her. Who are these people who live with her? Which of them is the intruder? Or is it Bella, herself?
She follows the clues and digs into her memory, bringing more information to light. Information that makes her question everything she's ever believed to be true, including her own family.