Footage shows a day at the Martinez Jail during the 1970s. Martinez is a city in the San Francisco Bay Area. 

Clip begins with inmates in a cafeteria, throwing away their trash and returning their meal trays after eating. 

Exterior wide shot of a facade of one of the Martinez Jail buildings. 

Jail guards are in a control room, monitoring CCTV monitors and operating a panel of lights and switches, which likely controls the opening of doors and cells.  

There’s also quick shots of the following: an empty jail cell; inmates eating in a cafeteria; inmates watching television; an inmate enters a shower room; close-up of the guard control panel; shots of a map of the Martinez Jail in the guard control room; and door label “module b.”