The bodyguard of newly elected President Lincoln finds out there is a plan to kill his tall boss. Powell lets his superiors know about this, but when they laugh and tell him the idea is nonsense, he quits and intensifies his search for the assassins. On a train going to Baltimore, he finds
out that one of the would-be killers is also on board. This increases the suspense as Powell tracks him down. Tension heightens as he fights all the assassins one-on-one, and slowly unravels the plot.