Henry, the English king, orders the former crusader knight to southern Wales in the fall of 1103 to deliver letters to local dignitaries and assess rival church leaders. Henry, whom Sir Geoffrey considers devious and dangerous, also charges him with discovering the secret held by a Norman knight who died seven years earlier in the Welsh port of Kermerdyn. Before the start of the journey, someone fatally stabs the scribe who wrote the letters. Sir Geoffrey, an honorable man, must put up with disagreeable traveling companions, whose duplicity and self-interest he finds difficult to stomach - and whose machinations leave men wounded, ill, and poisoned.