Lily falls in love with Sam the minute she sets eyes on him. It takes Sam a day or two longer. Curious, because Lily – independent, headstrong, rational – has never quite believed in love; while Sam – confident, passionate, romantic – thought he understood it inside out. Lily is an award-winning television documentary maker. Sam is an award-winning playwright. Both are in relationships that have quietly expired, but their encounter makes Lily and Sam come alive again. As they begin to work together on the page and on screen, an affair takes hold that they are powerless to resist. Arriving in mid-life, their relationship opens unexpected new worlds and, for Lily, offers her a surprising form of liberation. But what will happen to them when familiarity, illness and age begin to take their toll? What will survive?