A series of mysterious deaths of military personnel bring Jim face to face with the indestructible Col. "Iron Man" Torres. Crippled in an explosion that he blames on the other men of his company, Torres rebuilt himself as a 19th century "cyborg", and is seeking revenge on those he thinks wronged him...and President Grant was one of the men he served with.

An attempt to assassinate President Grant is foiled at the last minute by West and Gordon. However,there seems to be more going on than a simple assassination,as the weapon used in the attempt was one stolen in recent raids on government and territorial armories. The President refuses to cancel a trip to Dever,leaving Jim and Artemus only 36 hours to uncover who is responsible and stop them before it's too late.

After a series of disturbing incidents involving a raven that seems to hynoptize high-ranking officials into committing dastardly deeds,Agents West and Harper decide to find out what's going on. The incidents lead the new partners to a group calling themselves The Raven,led by Thaddeus Toombs and a man called Tycho (who has an enormous head and is very smart).