The Dominion fleet that disappeared in the Bajoran wormhole at the end of the Dominion War have reappeared and are invading parts of the Deneb sector. Intelligence believes that they have sought out their old allies, the Breen, and are collaborating with them to adapt their notorious energy-dampening weapon to Dominion warships.

The first encounter with that weapon had been a major setback for the Federation, Klingon and Romulan alliance in the Dominion War, effectively removing the fleets of two of the allies from the war from weeks on end. The rogue fleet cannot be allowed to gain an advantage like that if there is to be a chance of routing the invaders from the Deneb sector.

The U.S.S. Sutherland and her crew embark on a covert mission to ensure that the weapon adaption is unsuccessful.