She can't remember the last year. Her husband wants to keep it that way.
When Jo Harding falls down the stairs at home, she wakes up in hospital with partial amnesia - she's lost a whole year of memories.
A lot can happen in a year. Was Jo having an affair? Lying to her family? Starting a new life?
She can't remember what she did - or what happened the night she fell.
But she's beginning to realise she might not be as good a wife and mother as she thought.