this movie is EmiliadiGirolamo the series in charge of the screenwriter tells the true crime incident in 1992- RachelNickell rape and murder eee。 the police believed that ColinStagg the real murderer is the culprit, but there is insufficient evidence. in desperation, the young inspector decided to cooperate with a domestic criminal profiler and conduct a very bold undercover operation. NiamhAlgar playing the undercover police officer LizzieJames， she was assigned to approach the suspect ColinStagg and lure the other person. in addition, the reality is ColinStagg it's not the real murderer, the real murderer is RobertNapper， in 2008, the british interior ministry had to ColinStagg compensation is £706,000.