Though Nero is far from interested in taking on a new case, or leaving the comforts of home, Archie responds to a phone call. Jenkins is a little, dried up, old man who delivers a letter, but it hasn’t come from the person it was addressed by. Archie seems to have been set on a wild goose chase. Has it all been a ruse to get Archie on the scene to witness a crime?
Investigation turns up a plot of poisoning. A jealous lover, ill feelings from a step son, and the mystery of who sent those notes. All Archie can do is wait, stay in touch with Nero, and be alert for clues. Despite having Archie on hand, Edith is poisoned, and smoke screens and accusations fly.
With Nero now on hand, clues and crime details are reviewed with the cops. With the pressure turned up, a killer soon shows their hand. Later, Nero produces the hard proof to blow the lid off the mystery, and solve the crime. The answer is in the notes, and who wrote them, and of course in the type writer ribbon.