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.

A melody holds the clue West needs to trap a departmental traitor.