After giving a confident presentation to a group of MPs at the House of Commons, Yvonne Carmichael encounters an enigmatic stranger who awakens in her passions she did not know she had. As their affair intensifies, the air of secrecy and mystery surrounding Mark Costley only increases her attraction to him—until Yvonne experiences an attack from an unexpected quarter.

In the aftermath of the attack, a devastated YVONNE shuts down. She feels unable to talk to the police or her husband, but as a campaign of terror is mounted against her, she is pushed to her limits, and turns to her former lover, Costley, for advice.

Yvonne¿s life is turned upside down yet again, when she is ripped away from her family, and arrested for the murder of George Selway. In shock, Yvonne denies everything; but the police are convinced that the pair colluded to kill Selway in cold blood.

During the murder trial, Mark’s lawyer bases her client’s defense on the claim that he suffers from a personality disorder. When Yvonne takes the stand, she learns that the lawyer has another card to play—proving that Yvonne has lied to a jury that now holds her future in their hands.