The Van Gort jewels have been missing for three years. Francis Fontyne has stolen them, but now the Secret Service is on his trail in the persons of special agent Jean Hillis, Detective Bryce, and Jean's wonder dog Lightnin'. Bryce is abducted by Fontyne's gang and Jean is misled by her maid, who actually works for the gang. Rookie agent Tom Haldane helps as Lightnin' and Jean track down the gang.
—Jim Beaver <jumblejim@prodigy.net>