In the untamed landscapes of Mexico, a solitary mercenary named Hogan rescues a nun named Sara from a trio of violent attackers. Though initially distant, Hogan soon learns that Sister Sara is deeply involved in supporting Mexican revolutionaries fighting against the French occupation. Despite his mercenary demeanor, Hogan agrees to escort Sara to a distant rebel camp, drawn by the promise of valuable information she can provide about a French fort he plans to raid for its gold. Their journey across the rugged terrain is fraught with challenges, fostering an unlikely partnership between the pragmatic gunman and the devout nun.

As they navigate through perilous situations and hostile environments, the true nature of their mission gradually unfolds. Faced with numerous risky encounters, including French soldiers and dangerous wildlife, the pair must rely on each other's unique skills to survive. Along the way, Hogan finds himself increasingly intrigued by the enigmatic nun whose bravery and resourcefulness defy his expectations. With every step closer to their goal, the bond between them strengthens, setting the stage for significant revelations and unexpected twists that will redefine their pursuit and test their resolve.