Col. Stanleigh is a “sporty” individual, infatuated with Mary Thompson, the sister-in-law of the post commandant, and the daughter of an old reprobate addicted to cups and cards. Mary loves Lieut. Jones. This fact infuriates Stanleigh, who plans dire revenge on both. Old Thompson, heavily indebted to Stanleigh, is induced by him to rob the safe of the monthly pay roll. Jones frustrates this plan, but is not disposed to ruin the weak old man, on account of the love he bears for his daughter. Stanleigh discovers this and diverts suspicion toward Jones, who is tried, convicted and sentenced. An Indian uprising calls the garrison away from the fort. Lieut. Jones rides out alone, disgraced. He discovers the ruse of the Indians in time to make a desperate ride, get in touch with the misguided troops, and get them back to save the post Poor old Thompson, mortally wounded, confesses his crime. This exonerates Jones and implicates Stanleigh. The lovers are again united and Stanleigh loses his insignia of rank.