Roaming the Dakota Territory's Black Hills, Black Diablo stirs up a wretched hive of scum and villainy. Foiling his schemes are a trio of odd heroes independently patrolling the area: mysterious mute Dumb Hercules the Destroyer, young Dare Devil Dick and his rowdy rangers and veteran border detective Skylark Sam, who loves to make an entrance gliding to earth on a batwing-like parachute. When Diablo's white and Indian outlaws attack the incoming wagon train of Colonel Owens and his party, the newcomer turns to the heroes to band together and save his kidnapped daughter, now held by Lakota Sioux Chief Sitting Bull himself! The volume includes a new novel based on the original, plus for the first time a reprint of the novel as it appeared in 1912.