When a titan of industry, Stanford Embury, is found dead in his luxurious flat, there is a mysterious absence of motive, means, and suspects. But things change when a victim's relative comes forward with a surprising tale of an encounter with the deceased man's ghost, whose appearance brought with it an overwhelming taste and aroma of raspberry jam. It looked like the Embury's had a happy marriage, but suspicion falls on his wife Eunice when Stanford is found murdered in a locked set of bedrooms with access only by his wife or Aunt Abby. The mystery unfolds gradually in the novel.

Raspberry Jam presents an intriguing story that keeps the readers curious, wondering what will happen next. The strong characterization by the author and a gripping storyline with unexpected twists and turns made it a hit during its time.