A woman takes her own life by a lake in a South London park. It's an open and shut case, or so it seems. Five years later, a chance discovery forces her family to face the fact that the dead woman was not who everyone thought she was. Private investigator Patti Moran joins forces with a jaded police detective to find out the truth about Louise White - but with each new revelation the mystery only deepens and the investigation takes a sinister turn when the trail leads to secrets some people will kill to protect. It all comes down to a simple choice: what matters more? Survival - or justice?