Stardate: Unknown. A coded message from the Gamma Quadrant leads Garak to believe his mentor, Enabran Tain, is still alive. He and Worf seek him out, only to discover something much worse: a Dominion invasion fleet poised to attack the Alpha Quadrant.

The station readies for a Dominion attack. Worf and Garak meet some unexpected friends in a Dominion Prison camp.

Stardate: 50975.2. With the continuing battalions of Jem'Hadar entering the Alpha Quadrant in preparation for war, Sisko decides to mine the wormhole to prevent further troop movement. This provokes a confrontation between the Dominion and the Federation, forcing Sisko to abandon DS9.

Stardate: Unknown. Serving with his recruit son aboard a Klingon vessel, Worf finds his relationship with his son strained. Meanwhile, strained relationships abound on DS9 between Major Kira and Gul Dukat.

Stardate: Unknown. Sisko mounts an attack to re-take DS9, while Rom faces charges as an enemy of the Dominion state.

Stardate: Unknown. The Federation attacks DS9 in hopes of keeping the mine field in the wormhole intact, while the Dominion waits entrance to the Alpha Quadrant from the other side.