In Phoenix a sheriff guns down a banker and robs him of a document. Going to the banker's aid, a witness hears the dying man's last words and takes hold of the map the sheriff was really after. By the time the crooked lawman realizes he has the wrong document, Janelle Wellington is on the run, and framed for the murder of the banker. Back east, Falcon MacCallister's famous brother and sister plead with him to find a young woman who has vanished out West. Her name? Janelle Wellington.