A small border town in New Mexico, San Ildefonso had survived a lot. Marauding Indians, lawless bandoleros, soldiers in blue and raiders in war paint had come and gone. But now, renegades from south of the border were attempting to seize the village itself, in search of rumored conquistador treasure. Lazaro Guardia, agent for the Forthright Stage & Freight Company, leads defense. With few young men to conscript, the village women and even the priest take up arms. The answer may be an old cannon, housed for years in the mission...but is there someone among the villagers who knows how to aim and fire?