Synopsis
When Chris finds her husband Allan is having a torrid affair with her best friend Joanna, she sets about planning his demise and her apparent guilt with cold-blooded expertise, helped by her experience as a forensic pathologist. She chooses her friend and colleague Don, a police inspector, as her perfect alibi. Don knows she is guilty, but every attempt he makes to prove it shows her always one step ahead. So how will he trap her? And does he really want to?