A seemingly peaceful gardener becomes the subject of a police investigation when an anonymous tip suggests he is a serial killer. Patrick Aldermann presents the image of a quiet, family-oriented man, but Inspector Pascoe suspects there is a darker reality hidden behind his manicured rose garden. Chief Superintendent Dalziel remains skeptical of the accusations, creating a professional friction between the two investigators. The narrative unfolds as a procedural mystery, examining the tension between outward appearances and hidden criminal intent.

Readers frequently highlight the effectiveness of this adaptation in maintaining the suspense of the original mystery while remaining accessible to language learners. Discussion often centers on the dynamic between the two lead detectives, whose differing temperaments provide a classic investigative framework. Critics note that the prose is carefully calibrated to support vocabulary acquisition without sacrificing the narrative tension required for the genre. The book is widely regarded as a successful entry in the series for those seeking to engage with complex crime fiction at an advanced proficiency level.