Having successfully stopped the Xindi Superweapon, Archer is unexpectedly timetransported to 1944 World War II when - due to a fanatic who has diabolically tampered with the timeline -- Nazis have invaded, and are conquering, America.
The Enterprise crew returns to a hero's welcome on Earth as Archer battles emotional demons surfacing from the past year while T'Pol takes Trip to her Vulcan home and faces her former fiancé who wants to rekindle their past.
Archer must join forces with a brilliant criminal doctor to retrieve a force of superior, genetically-altered humans who have killed to apprehend a Bird of Prey and incurred the wrath of war-hungry Klingons.
On orders from Starfleet, Archer and his crew must stop Dr. Soong and his army of genetically-altered superhumans - the Augments -- who are intent on invading a medical facility to release thousands of Augment embryos which would eventually
decimate and take over mankind.
With Soong and the Augments intent on raising their embryos on an isolated planet, Archer and his crew must find and stop them... particularly before the Augments start a war by unleashing a deadly pathogen on a Klingon colony that will be blamed on
Just as Vulcans and humans' relations may be on the upswing, a bomb detonates the Earth embassy leading Archer to determine the culprit, a mission that finds he and T'Pol chasing down a zealous Vulcan sect - the Syrrannites - across a horrific territory known as The Forge.
At the Syrrannite compound, Archer and T'Pol help the Vulcan faction in unexpected ways while Trip plots a rescue with a new Vulcan ally, and the Vulcan High Command targets both the Syrrannites... and Enterprise.
On Vulcan, Archer must make his way to the High Command with the Kir'Shara artifact to prevent the Vulcans' waging war on the Andorians, as - aboard Enterprise -- Trip works with the Andorians to launch a surprise attack on the mighty Vulcans.