Chiefly set in London during the First World War and in the early 1920s (primarily 1921 and 1922), the film concerns a daydreaming young woman, Edith Graydon (Little), who attracts, then marries, an ordinary shipping clerk, Percy Thompson (Moran), who reminds her of a character in books.

Over the course of their tempestuous affair, Edith writes to Bywaters during his extended absences at sea about her growing boredom and frustration with the dull Percy, who has grown jealous and violent at times.

The letters burst with Edith's vivid imagination, including her hopes for a romantic future with Bywaters and her alleged attempts to kill her husband through feeding him glass and poisons.

Rumours abounded that she was pregnant, that her internal organs fell out of her body when she was hanged, and that the experience contributed to the resignation and eventual suicide of her executioner, John Ellis.

[3] The Guardian critic Peter Bradshaw described it as a "spruce, neatly furnished and nicely acted true-life crime story" but also found it to be "a flesh-creeping domestic thriller with hints of grisly black comedy", and praised Kit Hesketh-Harvey's period songs.