An orphaned young girl tells about sailing to Alaska in 1925 with her big sister to fulfill their father's dying wish. The sister is promised to be the bride of his wealthy gold mining friend. An evil force follows them on sea, land, and in the air as they work to solve a murder. Their lives become involved with a dashing pilot, loyal pioneer, bewitching mystic, daring gambler and endearing friends. Inspired with the new thrill of aviation, their adventure brings life threatening danger and sparks of love.