Sally is watching the news with her husband when she hears a name she ought not recognise: Mark Bretherick. Last year, a work trip Sally had planned was cancelled last minute. Desperate for a break from her busy life juggling work and a young family, Sally didn't tell her husband that the trip had fallen through. All she wanted was some time to herself - but it didn't work out that way because Sally met Mark Bretherick. All the details are the same: where he lives, his job, his wife Geraldine and daughter Lucy. Except Sally has never seen the man on the news before. And Geraldine and Lucy Bretherick are both dead . . .