A science fiction novel that follows the story of two sisters, separated by an ocean, who desperately try to find each other in a climate-ravaged future... Cee has been trapped on an abandoned island for three years, with no memory of how she got there nor from her previous life. All she knows is that somewhere, beyond the horizon, she has a sister named Kay, and it's up to Cee to cross the ocean to find her. A world away, Kasey Mizuhara, a sixteen-year-old girl and a prodigy in various areas of science, lives in an ecological city built for people who protected the planet, and who now need to protect themselves from it. With natural disasters on the rise due to climate change, green cities offer clean air, water and shelter. Its residents, in return, must spend at least a third of their time in stasis pods and conduct business virtually whenever possible to reduce their ecological footprint. While Kasey, an introverted and lonely girl, doesn't mind having that lifestyle, her sister Celia hated it. Celia was popular and charming, and she much preferred the outside world. However, no one could have predicted that Celia would get on a boat to go out to sea and never return. Now it's been three months since Celia disappeared, and Kasey has lost all hope. Logic dictates that her sister is dead. However, she decides to retrace Celia's last steps. Where they will take her, she does not know. Her sister hid many secrets, but Kasey also has one of her own.