A knock at the door interrupts Stuart Brannon's fortieth birthday party. Standing on the doorstep is a twelve-year-old Indian boy with a shocking announcement: Brannon is his father!

The boy also brings the sad news that his mother, whom Brannon befriended at Broken Arrow Crossing, is dying in a Navajo camp. Brannon determines to bring her back to the ranch, but decides to wait and see her before telling Littlefoot the truth about his parentage--that his real father was an outlaw.

Danger stalks the trail to the Utah border. A desperado Brannon once sent to prison closes in on him, determined to get revenge. A gun battle breaks out. Brannon captures Trevor again; however, the outlaw tricks a gullible sheriff into letting him go and locking Brannon up.

This final Stuart Brannon adventure pits the famous ex-lawman against the shrewdest outlaw of his career, takes him into perilous situations, and again puts before his heart a crucial question.