It is extremely bad luck for Sarah Atkins that she is very slightly over the limit when she knocks down and kills a man in a patch of fog. It is even worse luck that the man is Jonathan Cool, a well-known pop star.

There are three witnesses: Cool's girlfriend, Sarah's husband and Sarah, whose fate will turn on their testimony. But as the evidence unfolds, it begins to appear that this may not have been a run-of-the-mill accident, and it is down to her solicitor, Rosa Epton, to unravel the truth.