What was it that Marina Gregg, the famous film actress, saw just before a murder was committed in her house? What or who caused her expression to change so violently that one observer was reminded of Alfred Lord Tennyson:
Out flew the web and floated wide;
The mirror crack'd from side to side:
"The curse is come upon me," cried
The Lady of Shallot.
A few minutes later a body lay in Marina's large house - the second time a victim of wilful murder had been discovered there. Miss Marple, whose house in St Mary Mead is close to the scene of the murder, finds a perfect opportunity to indulge in the particular kind of 'unravelling' at which she is adept.