Ros Tyler wakes from a drugged sleep in her London apartment to discover that her roommate has been murdered and that she has been sexually assaulted but can remember nothing. During the investigation, Ros is drawn into an illicit relationship with the investigating detective who admits that they know who the killer is but do not have enough evidence to obtain a conviction. Ros decides to lie in court and identify the accused man as her attacker but her actions have unexpected and unwelcome repercussions. As events spiral out of control, they realize that only one person knows what really happened that night and that sometimes the truth can be even more dangerous than a lie.
