Lawyer Dismas Hardy is sure his wife is the most reliable of mothers. So when she fails to pick their children up from school one Thursday afternoon he's convinced something terrible has happened. It has. His wife has been keeping a secret from him - for which she is prepared to go to jail. It's a secret that threatens their marriage...and their lives. For Dismas Hardy a harrowing journey has begun, a search that exposes one stunning revelation after another, about the secrets men and women hide from the law, from each other - and from themselves...