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Even though his mother has been dead for three years, young Billy Andrews (a very young William Collier, Jr.) still worships her memory. So when his father (Wyndham Standing) -- the captain of a post in the untamed West -- remarries, Billy is naturally reluctant to accept the interloper, Mary (Anna Lehr). The Indians go on the warpath and trick Captain Andrews and his troops into leaving the fort while they plan an attack. But Billy rises to the occasion by first saving his stepmother, then jumping on a horse and dashing from hill to hill, bugling all the while, so that the Indians will think that the troops are returning. This keeps them at bay until his father shows up with the cavalry and saves the fort. This was Collier's very first starring role; up until then, he was just the young son of famed stage actor William Collier, Sr.