When Tommy and Tuppence visit an elderly aunt in Sunny Ridge nursing home, Tuppence is concerned by one resident -- Mrs. Lancaster's -- ramblings about a dead child behind the lounge fireplace.

![marple_2][marple_2]

Geraldine McEwan as Miss Marple

Soon after, Aunt Ada dies and Mrs. Lancaster disappears in the same evening. Tuppence suspects that an old painting of 'The Witch's House' and a warning note recovered from Ada's room reveal clues to both women's unexpected departures.