When PC Helen Anderson takes the files for a forthcoming court case to study over the weekend, she commits a cardinal error. For those files are not supposed to leave the police station - and the moment they fall into the wrong hands, Helen's ordinary, uneventful life begins to spiral out of control. For one small lie will lead to another, then another - culminating in a rendezvous in an ordinary suburban house in an ordinary Bristol street ... the scene of a gruesome and extraordinary murder.