Dr. John Thorndyke, the renowned expert in medical jurisprudence and forensic investigation faces not one, but three mysteries: the claim of a rich American to an English title and estates, the theft of a small fortune in platinum, and most puzzling of all, the strange head found in a box in the baggage room of a railway station. The good doctor must solve these seemingly unrelated cases using his usual bag of forensic tricks and a few new ones for good measure. The crooks involved are unusually clever, but as usual, justice is served when . . . Dr. Thorndyke Intervenes