The marriage of a well-bred Royalist lady and an illegitimate Roundhead Colonel is less a match made in heaven than a union doomed to hell. Unfortunately, Sir Robert Brandon's last will and testament leaves Venetia Clifford and Gabriel Brandon with little choice in the matter - deeply though they both resent it.
Gabriel continues to serve in the New Model Army whilst, behind his back, Venetia engages in clandestine activities on behalf of the King; and the lives of both of them are further complicated when Gabriel's half-brother - to whom Venetia was formerly betrothed - returns from exile. While the Army and Parliament argue over the fate of the King, Gabriel realises that he has a dangerous enemy and Venetia finally begins to see the man rather than the Roundhead Colonel. As events gather pace, bringing the King to trial, the tangled web of danger and deceit surrounding both Gabriel and Venetia slowly tightens its grip.