Ruby said I'd never drown-not in deep ocean, not by shipwreck, not even by falling drunk into someone's bottomless backyard pool ... It sounded impossible, something no one would believe if anyone other than Ruby were the one to tell it. But Ruby was right: The body found that night wouldn't be, couldn't be mine.

Chloe's older sister, Ruby, is the girl everyone looks to and longs for, who can't be captured or caged. After a night with Ruby's friends goes horribly wrong and Chloe discovers the dead body of her classmate London Hayes floating in the reservoir, Chloe is sent away-away from home, away from Ruby.

But Ruby will do anything to get her sister back, and when Chloe returns home at last, she finds a precarious and deadly balance waiting for her. As Chloe flirts with the truth that Ruby has hidden deeply away, the fragile line between life and death is redrawn by the complex bonds of sisterhood.