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The Vulcans having decimated the Syrrannite compound, Archer — with T'Pol and T'Pau — is driven on bringing the Kir'Shara relic to the Vulcan High Command. V'Las has succeeded in convincing his fellow High Command members that the Andorians will be using Xindi technology to obliterate the Vulcans — although they have a peace accord in place — and is plotting the attack. Because the future-knowing Surak is literally in his mind, Archer knows that time is of the essence; he must bring the Kir'Shara to the High Command before the Vulcans go to war with the Andorians. Unfortunately for Archer and his traveling companions, V'Las is going to extremes to thwart any interference they may cause in carrying out his battle strategy. Further, their showing up and professing the pacifistic views of the Vulcan Syrrannite faction would nullify his framing them for the embassy bombing. To that end, he has sent his henchman Talok to find Archer, T'Pol and T'Pau and "eradicate? them.

Meanwhile, Trip is intent on halting an Andorian-Vulcan face-off that would surely spell doom for Earth as well. Working with Soval, the two uncover the Vulcan strategy and then take their information to Andorian Commander Shran. Shran is initially uncertain that Soval has Andoria's best interests in mind and goes so far as to beam the Vulcan aboard the Andorian ship for rounds of emotional torment. But finally, when Trip discovers that the missing Soval is in the hands of Shran, he intercedes, convincing Shran that Soval is indeed thwarting his own race's plans for the good of all.

Talok and his crew find Archer, T'Pol and T'Pau, and a battle ensues. While T'Pau leads Archer — and the invaluable Kir'Shara — to safety, T'Pol is captured, to Archer's chagrin. While Talok tries to find the still-at-large Archer and T'Pau, T'Pol is taken to the High Command.

Continuing their trek to the High Command as well, Archer and T'Pau arrive just as V'Las is relishing the beginning battle between the Vulcans and the Andorians. However, Shran has led the Andorians — with Trip and Enterprise's help – to surprise and combat the Vulcan ships. Heavy battle starts but V'Las faces resistance to his plans from fellow High Command members when Archer arrives, claiming he has the Kir'Shara. To prove it, Archer — instinctively working a series of controls on the artifact — unleashes holographic images of Vulcan text and graphics. The Kir'Shara's obvious power and meaning astonishes the High Command members — who now turn against V'Las.

As Archer explains that T'Pau was framed for the embassy bombing, the High Command members realize that — through her work in bringing the Kir'Shara to them — the Vulcans' true path is now revealed.

With that revelation, and as Enterprise and the Andorian ship are doing their best to ward off the Vulcans, the Vulcan ships are called off and a war is averted. Afterward, Archer realizes that Vulcan and Earth are headed into a new era as the High Command is dissolved. Archer also, fortunately, is able to mind-meld with a Vulcan monk, who relieves him of the katra so that Surak is no longer inside his mind.

And while V'Las is relieved of his duty and an investigation is launched into his role in the embassy bombing, he and Talok seem to be in the midst of still continuing more nefarious plans.