A tribe of Apache's had moved down into the territory below Pecos. No-one knew where they'd strike next with their ruthless savagery. and their first attack had been against a wagon train of pioneers. Their trip had been almost over when the Indians had taken them by surprise. The next attack had been against a small settlement at sundown, and when the big drives started, the ranchers never knew when they'd lose their herds. The situation had come to the attention of the commanders at Fort Lancaster, who knew that until they got reinforcements, there was no way to stop them - and that there was a real risk the Chief would attack the Fort itself before too long...