17 year old Ava has been stuck indoors all her life. She's desperate to go into the outside, and enjoy the sunset soaking into her skin, but there's one problem. She would die within a few hours. Even after three centuries, the fumes and toxins of the outdoors are still deadly. With Choosing Day coming up, Ava's dreams of going outdoors seem more and more ridiculous; until she finds a book. The Lost Country is no ordinary book. It has many secrets, locked away just like Ava, and the only life she's ever known.