When someone sets a nuke goes off, Frank is being sent back to avert it. They give him what info they could get on who might have done it. However because of a mistake on Frank's part, the sphere gets sent back without Frank.

As tensions with North Korea increase, the by-the-book commander of an American nuclear silo fires a missile despite incomplete information, causing a war. Parker must travel back to try and convince the man what is the right action to be taken.