When the battered body of Sir William Ponson is found in the Cranshaw River near his home, Luce Manor, it is uncertain whether it is an accident, suicide-or murder. When the evidence points to the latter Inspector Tanner of Scotland yard is called in. Those who would benefit most from his death, his son and his nephew, would seem to have unbreakable alibis. But do they. And then there is the mysterious fifth man who’s footprints were found at the crime scene. To solve the case, Inspector Tanner must track him down and discover the secrets behind …The Ponson Case!