Two teenagers with a deadly disease fall in love on the brink of a cure. Up until his diagnosis, Lane lived a fairly predictable life. Now he is at a tuberculosis sanatorium called Latham House, where he discovers an insular world with paradoxical rules, med sensors, and an eccentric yet utterly compelling confidante named Sadie-- and life as Lane knows it will never be the same. As Lane and Sadie fall in love-- and as their groups begins to fall sicker-- their world threatens to come crashing down.