When Captain Sisko leads the Defiant on a dangerous mission into the Gamma Quadrant to liberate a conquered world, the Bajoran government insists that Kai Winn, the Federation's longtime nemesis, assume complete control of the space station. Left behind by Sisko, Major Kira expects the worst from the Kai's new regime, but even she is caught by surprise when a fleet of alien warships attack Deep Space Nine!

Kai Winn, the supreme spiritual leader of the Bajoran people, has never divulged what she personally did during the harsh and perilous days of the Occupation. But now, as alien warships fight to reclaim Deep Space Nine, she cannot help recalling those bygone days -- and her own private war against the alien oppressors. Meanwhile, on the other side of the wormhole, Captain Sisko and the crew of the Defiant are stranded on an alien world overrun by ruthless invaders....

Major Kira and the ambitious Kai Winn have never seen ey to eye, but when alien renegades Invade "Deep Space Nine," determined to capture one of the sacred Orbs of the Prophets, two women must work together to preserve both the Orb and the safety of everyone aboard the station. Captain Sisko and the crew of the cannot come to Kira's aid; they are too busy teaching an entire world how to fight back against a invasion-- even of it means breaking the Prime Directive!

The uneasy peace between the Federation and the Romulan Empire is strained by an unknown force that is disrupting space, creating "dead zones" where advance technology will not function. Now, Captain Jean-Luc Picard and Ambassador Spock join forces with a Romulan war criminal to find the source of the disruption--even if it means sacrificing the peace they hope to save.

Beyond the Federation's boundaries, Picard and his Romulan allies discover the source of the subspace crisis: an alien mechanism suspended between a black hole and a nearby inhabited planet--preventing the planet from disappearing forever. But its effects are eroding subspace at speeds faster than light.