<P>When popular actress Jane Wilkinson, the wife of wealthy Lord Edgware, asks her husband for a divorce, he refuses. The marriage has never been happy, and Jane wants to marry another man so Lady Edgware enlists the help of Hercule Poirot to intervene on her behalf. But when Poirot meets with Lord Edgware he finds him completely agreeable to a divorce and says he has sent a letter to his wife to settle the matter. Jane insists she never received the letter, and is thrilled by this news.</P><P>That very evening, Lord Edgware is killed, and several witnesses testify that Jane was present at the home at the time of the murder. Yet twelve other reliable witnesses can attest to the fact that she was with them at a dinner party that evening and could not possibly have killed her husband.</P><P>There's some speculation that a visiting American actress who has been regaling audiences with her spot-on impersonations of Jane Wilkinson might have had a hand in the murder. But she's discovered the next morning in her flat -- dead from a drug overdose.</P>