

Tommy is now over seventy, and Tuppence is sixty-six. Unlike Christie's other recurring characters, the detectives have aged in accordance with time.

The novel marks the return of Tommy and Tuppence after nearly three decades of silence.

Her incessant reference to 'something behind the fireplace' and a 'poor child' seems at first the incoherent ramblings of an elderly woman, though when Aunt Ada sadly passes away, a painting left to Tommy in her will leads the duo on a dangerous adventure where they finally discover exactly what Mrs Lancaster was talking about.Published in 1968, the title is taken from a line in Shakespeare's Macbeth. Tuppence meets Miss Marple and together they follow a path of clues that lead them to the Norfolk village of Farrell St Edmund, where they find a community guarding an array of secrets."By the pricking of my thumbs,Something wicked this way comes."William Shakespeare – Macbeth (Act IV, Scene 1)When visiting Tommy's Aunt Ada in her nursing home, Tuppence encounters some odd residents, Mrs Lancaster, being the strangest of them all. So when Tuppence hears about Aunt Ada's sudden death and the disappearance of her friend Mrs Lancaster, she realises her concerns were right. When Tommy and Tuppence visit an elderly aunt in her nursing home, Tuppence is concerned by the odd behaviour of some staff and residents. Only by getting to the bottom of these secrets do they begin to unravel the truth about the mystery of Aunt Ada’s death and Mrs Lancaster’s disappearance Tuppence meets Miss Marple and together they follow a path of clues that lead them to the Norfolk village of Farrell St Edmund, where they find a community guarding an array of secrets. So when Tuppence hears about Aunt Ada’s sudden death and the disappearance of her friend Mrs Lancaster, she realises her concerns were right.
