Tonight, Jennifer Goodwin has reckless, intense sex with a stranger. As she makes her way home, she spies a heated, violent argument through the curtains of a neighbour's house. Powerless to intervene, she remains in the shadows before slipping away to the warmth of her respectable, detached townhouse and the loving arms of her husband. Jen has it all - a secure, happy marriage to GP Chris, two children, Nicole and Archie. And a great job - as the no nonsense headteacher of the local secondary school. A pillar of the community. Trustworthy. Respected. Honest?