Muriel Fayne is old and arthritic. So when the local minister arrives for tea and finds her facedown in the shallow lily pond behind her house in the English Cotswolds, no one suspects foul play. The obvious explanation is that the old girl lost her balance and couldn't pull herself out of the water in no time. But Muriel Fayne is no sooner laid to rest than her daughter Helen suddenly becomes "accident prone" herself.