Beatrice Hemming has returned from the US because her younger sister Tess has gone missing from her home in London. The two have always been very close and the abruptness of her disappearance, without a word to her beloved sister, makes Beatrice believe something terrible must have happened to Tess. Could it have been linked to Tess's pregnancy by her college lecturer? Beatrice quickly becomes heavily involved, taking part in a police reconstruction and meeting one of Tess's new friends. Then she hears two momentous pieces of news about Tess. The abridger is Lauris Morgan Griffiths and the reader is Hattie Morahan. Producers: Sara Davies and Christine Hall.