A train traveling through the Rockies is held up and boarded by two thugs. They rob the wealthy occupants at gunpoint and then make their getaway by handcar.
This one-reel documentary is pretty much what it says in the title. Cavalrymen ride their horses, first over low hedges, then over increasingly rough terrain, until by the end they are sliding down hills to cross a stream and going into caves.
Despite the lurid title, no one gets shot in this long actuality from Lubin. Instead, it's another panorama, as indicated in the movie's alternative title, of the devastation wrought on San Francisco by the Earthquake and subsequent fire.