Stardate: 51825.4 Nog and Jake are rescued by the U.S.S. Valiant when their ship is attacked by the Dominion while on their way to Ferenginar. The crew of the Valiant consists of the Starfleet Cadet corps known as 'Red Squad,' an elite band of cadets, after the main crew were killed when the Dominion War broke out. They decide to complete their mission, which Jake sees as suicide.moreless
Sisko faces thousands of Dominion warships alone in an attempt to regain Deep Space Nine. Kira, Jake and Leeta are suspected of trying to stop the attempts at disabling the minefield and are held for questioning. Everything seems doomed and everyone makes ready for a final stand.
Odo struggles with his choices between his friends and the Link. Sisko faces a suicide mission in order to reclaim Deep Space Nine. Rom is ordered to be executed. Kira and Damar come to blows over Ziyal and Gul Dukat.
Sisko is promoted, and Dax is placed in command of the Defiant. She must disable a Dominion sensor array that has been monitoring all traffic within five sectors. Meanwhile, on Deep Space Nine, now named Terok Nor, Kira must find a way of preventing the minefield from being destroyed. Odo's loyalties are questioned when he physically joins with the Founder Leader.
Several months after Deep Space Nine was handed over to the Dominion, the Federation is losing the war. Being relieved of command of the Defiant, Sisko is placed in command of the salvaged Jem'Hadar warship they discovered several months earlier, and must destroy the main Ketracel-White production facility in the Alpha Quadrant. The mission is a success, but it leaves the ship without warp engines and stranded 17 years from the nearest Federation Starbase.