Once the inheritance of a noble family, the five beautiful jewels of Castile were stolen, separated and their identity lost. Few men could recognize them for what they were, but John Mannering, alias 'The Baron' was such a man. In pursuit of jewels, Mannering has the misfortune to come up against three of the ugliest criminals he has ever met. To these men, robbery and violence are merely a game, and the Baron an inconvenient pawn who must fight for his life as well as the prize.