Heidi and Jason aren't like other couples. Six years ago, Heidi's daughter was murdered. A year later, Jason's son Barney disappeared. Their shared loss brought them together.

By chance, Heidi meets a boy she's certain is her husband's long-missing son - but Jason is equally convinced it's not him.

Is Heidi mad? Or is Jason hiding something? And can their fragile marriage survive Heidi's search for the truth . . .