Hercule Poirot is determined to solve an old husband & wife double murder that is still an open verdict Hercule Poirot stood on the cliff-top Here many years earlier there had been a tragic accident This was followed by the grisly discovery of two more bodies
- a husband & wife
- shot dead But who had killed whom? Was it a suicide pact? A crime of passion? Or cold-blooded murder? Poirot delves back into the past & discovers that old sin leave long shadows'