Provost Captain Slade Moran arrives from Fort Benson, Colorado, to investigate the disappearance of an army payroll and its military secret. A grim trail has taken him to the empty payroll coach and its murdered escort, with one soldier mysteriously missing. Moran is led to Moundville where he's confronted by desperate men plotting to steal a gold mine. Embroiled in double-cross and mayhem, Moran fears he will fail in his duty. Against all odds, can he succeed?