When a recently released executive from Michigan Motors is found murdered inside a luxury limousine, John Putnam Thatcher must navigate the treacherous waters of corporate intrigue to identify the killer. Thatcher, a senior vice-president at the Sloan Guaranty Trust, finds his skepticism regarding a potential investment validated by a wave of violence. As he investigates the death, he faces opposition from powerful automotive industry figures and internal company politics. The narrative follows a traditional mystery structure, utilizing a third-person perspective to track Thatcher's analytical approach to the crime. He must balance his professional responsibilities at the bank with the demands of an active criminal investigation.

Readers frequently highlight the unique blend of high-stakes finance and classic murder mystery tropes that define this series. Discussion often centers on the author's ability to make complex corporate maneuvering accessible and engaging for a general audience. Critics often praise the dry wit and the sharp, observational style that Thatcher employs throughout his investigations. The balance between the technical aspects of the automotive industry and the personal motivations of the suspects is consistently noted as a strength. Many readers appreciate the lack of gratuitous violence, preferring the intellectual challenge presented by the puzzle-like nature of the plot.