Twelve-year-old Flavia de Luce is back at Buckshaw at last, but her homecoming is overshadowed by news of her father's illness. Forbidden from visiting him in hospital, Flavia busies herself in the village, but she soon makes a macabre discovery: the corpse of a reclusive woodcarver in an empty house, except for a curiously uncurious cat. Curiosity may not kill this cat, but Flavia is energized at the prospect of a new investigation. However, what awaits Flavia will shake her to the core.

The absence of Flavia DeLuce’s mother, Harriet, has always cast a shadow, since her presumed death in a mountaineering accident in Tibet. Now, astonishingly, a specially commissioned train is bringing Harriet back to Buckshaw. But rather than putting the past finally to rest, Harriet's return is set to trigger a further series of bizarre and deadly events, as a most curious group of individuals converge on Buckshaw to pay their respects…

Flavia is enjoying the summer, spending her days punting along the river with her reluctant family. Languishing in boredom, she drags a slack hand in the water - and catches her fingers in the open mouth of a drowned corpse. Flavia needs to put her super-sleuthing skills to the test to investigate the murder of three gossips in the local church and to keep her sisters out of danger.

The villagers of Bishop’s Lacey are holding their collective breath as St Tancred’s tomb in the local church is about to be opened after five hundred years. Inveterate eleven-year-old sleuth Flavia de Luce is first at the scene, but the body she finds lying there is not that of a desiccated saint; it is Mr Collicutt, St Tancred's celebrated organist.

Flavia de Luce, the 12-year-old chemist and amateur detective, is eager to turn professional. She and her father's valet, Dogger, have founded a detective agency, Arthur Dogger & Associates, and unexpectedly cut into their first case during the revelry at her sister's wedding reception. After an eventful ceremony with a missing best man and spontaneous ventriloquist act, spirits are high as Feely and her new husband head for the towering and beautifully iced wedding cake. But as Feely slices into the first piece, a scream rings out - the bridal cake contains a severed human finger.