A series of detective narratives centers on Michael Danevitch, a Russian secret-service operative who investigates a range of criminal and political mysteries across Europe. Episodes depict manhunts, espionage, assassinations, thefts, poisonings, secret treaties, and conspiracies, with tales of vanished fortunes, stolen crown jewels, and a puzzling dead-hand clue. Stories emphasize cunning disguises, forensic observation, interrogation, and international pursuit, alternating dramatic confrontations with methodical detection to reveal tangled plots and the procedural craft of state-level sleuthing.