While out on patrol, Blutch and Chesterfield encounter an unusual soldier: a woman wearing a Union uniform, who has come to join the army to look for her brother and uphold the family's honour. Blutch is unconvinced, but the sergeant, won over by the combination of bravery and a pretty face, agrees to help her. That, however, means taking her along for Captain Stark's demented charges - a prospect that could drive anyone to shirk their duty or desert...