Sent to scout the enemy, Blutch and Chesterfield are chased by a Confederate patrol and forced to cross the Rio Grande to safety. But that safety is relative: stuck between Apache bandits and Mexican outlaws, our two Bluecoats have no choice but to disguise themselves as civilians - Blutch as a peasant, Chesterfield as a monk. But the nearby village is eagerly awaiting its new padre, and the villagers aren't fooled by the deception.