One twin vanished. The other twin remained. Until now... When her daughter Eden came home from the hospital, Lucy was profoundly relieved. Eden had survived a drowning incident and had no apparent brain damage, no serious injuries, not even a scratch on her. Lucy fervently welcomed having a second chance at being the good mother she should have been before her teenager´s accident. Until Eden tells her that Eden isn´t her name. Until she starts calling herself Eli. The name Lucy had reserved for Eden´s unborn twin. Don´t worry, says the doctor. Eden is completely fine, says her husband. Of course I´m fine, Eden says, with that strange new smile of hers. I didn´t die. I´m here. But Lucy knows something´s very wrong with Eden. She´s not her maddening, complicated teenage girl anymore--this straight-backed, even tempered, steady-eyed child in her house is someone else entirely. Eden, it seems, is the twin who disappeared...