Four detective fans from a fashionable golf club who fancy themselves great amateur detectives - a priest, a retired official, a university professor and a journalist - discover a body near a viaduct. Perhaps it would be better to let the police understand what happened, but would the four enterprising intellectuals give up the long-awaited chance to test their detective theories in practice? The gentlemen begin their own investigation...Insurance companies really do not like to part with their money. That's why Miles Breedon is tasked with proving that the suspicious death of Mr. Mottram, one of the company's clients, is a suicide and therefore the insurance won't pay out. However, Breedon's old friend, Scotland Yard inspector Leyland, is convinced that a brutal murder has occurred... Miles and Leyland begin to investigate the death of the unfortunate Mottram independently of each other. Which of them will be right?..