'He who controls the past, controls the future. He who controls the present, controls the past.' Orwell. 1984.
What does it take to change history and destroy our reality? Change events on the same date, 11 September, in six different years. The Time Patrol must send an agent back to each day, with just 24 hours for each to defeat the Shadow's plan to disrupt our time-line, creating a time tsunami and wiping our present out.
Roland goes to Nine-Eleven 9 A.D., when three Roman legions are annihilated by an alliance of Germanic tribes; the Romans would never again attempt to expand east of the Rhine River. What if the Romans won?
Ivar travels to Nine-Eleven 1973, when a military coup in Chile, engineered by the United States, topples the elected President and brings Pinochet to power. What if the coup fails?
Moms goes back to Nine-Eleven 1857, when 120 emigrants are slaughtered by Mormons in the Mountain Meadows Massacre in Utah. What if it was worse than that? And what if Moms faces a personal dilemma of her own past there?
Doc goes to Nine-Eleven 1776, when Benjamin Franklin and John Adams sit down with British Admiral Howe on Staten Island to discuss a possible peace settlement. What if they succeed?
On Nine-Eleven 2001, while the world is focused on the United States, the largest plane in the world is carrying the largest nuclear weapon ever made across Russia; but disappears. Who took it? Where is it? That's Eagle's mission.
And then there is the most mysterious mission of all, where a Time Patrol agent must go into the Patrol's own recent history to insure it even exists.
The Shadow's plan is to disrupt our time-line, creating a time tsunami and wiping our present out.
It is up to the Time Patrol to make sure that doesn't happen.