Technical Sergeant Scott Rees figures this will be just another hot August day on base for him and his team of United States Air Force security policemen. Little do they know they are about to become subjects in a top-secret time travel experiment, forcing them into a fight for their lives in the middle of the American Civil War.
Major General Richard Lucas and Chief Master Sergeant Joe Black want more time to test the Clio time machine before putting it into use, but their request falls on deaf ears as impatient government officials push forward. The incompetence of a key technician and a power grab by his senator uncle have thrown the project into chaos, leaving the security policemen caught in the middle.
Now Rees and his team face a double-barreled race against time to escape the past and almost certain death.