Colonel Blood (not to be confused with Sabatini's Captain) is an Irishman who gains a considerable reputation in Restoration England as a murderer of Catholics, and he is particularly down on the venerable Duke of Ormond whom he is determined to hang. Christopher Hallam, younger son of a country squire, coming to London to earn his fame, joins the Duke's household, takes up the grudge against Blood and falls in love with Nancy Talbot, whose father is the keeper of the Crown jewels in the Tower. Blood, caught in an attempt to steal the jewels, is nevertheless acquitted by Charles II, champion of rogues. Picaresque sport in period display, but not the best of its kind.