Two mysterious murders on the da Vinci lead to the Gamma Quadrant and a Dominion base. A pre-warp planet occupied by the Dominion still has scars from both sides of that conflict. Plus Gomez, computer expert Soloman, and Security Chief Corsi are haunted by demons from their past.

But the greatest threat of all comes from a visit to Deep Space 9™. A fissure has opened up between realities, endangering the very existence of the Bajoran system -- and also stranding Doctors Lense and Bashir on a war-torn planet from which they may never escape.