Blutch and Chesterfield go up in an observation balloon in order to spy on the Confederate troops. But the plot thickens when our heroes crash land on their superiors.

Blutch and Chesterfield get away from the 22nd Cavalry and go spend some R&R at Fort Bow, their old posting on the frontier. That's where Chesterfield's flame Amelia lives. But when the cavalrymen arrive, they find the young lady dancing with a dashing young lieutenant.

General Alexander's Union army is out of horses, and it is now facing none other than Robert E. Lee himself. To rebuild the Northern Cavalry before the coming battle, Blutch and Chesterfield are sent to buy new mounts, with the help of legendary horse trainer Ben 'Bronco Benny' Wilcox. But, first, they'll have to cross Rebel lines, face angry Indians, and deal with Benny's fascination with a very special horse named Traveller.

A flashback to the origins of the infernal pair Contrary to what you may believe, even the very martial Sergeant Chesterfield didn t always wear the Union s blue uniform. Both he and Blutch were civilians at the beginning of the war butcher s boy and barman, respectively. So, how did they find themselves in the 22nd Cavalry? Well, there was a rather unscrupulous recruiting officer, a lot of alcohol, an overly eager young lady ... and a definite aversion for the infantry "