The airship Tristan is hijacked by a member of the Fleurs du Mal who demands the release of his comrades held in Vatican captivity. But one passenger stands in his way - Abel Nightroad.

Abel's search for the "star" has tangled him in the web of war. Sister Esther seeks vengeance for the death of her mentor and has gone to great lengths in her quest to eliminate the one ultimately responsible.

The Rosen Kreuz has surfaced again. Fueling the personal revenge of others for their own evil ends, the nefarious order could plunge both races back into the dark days of Armageddon.

AX scrambles to prevent Rosen Kreuz from destroying Rome with the Silent Noise device, but they may have to act without Abel. Driven by despair, Abel considers turning in his gun.

Under house arrest, Lady Caterina finds herself face to face with a manipulative enemy. Abel's efforts to save her result in an encounter with a dangerous new foe.

Whispers of an assassination attempt on the Lady Caterina turn agents of the Vatican against each other. Abel seeks a safe path through the hostilities harbored by both sides, and Esther must be the guide.

While in Londinium for the Queen of Albion's funeral, Esther and Pope Alessandro are taken hostage by vampires. The AX must rescue them before Cardinal Medici makes a martyr of the Pope.