Stardate 47944.2: Chief O'Brien embarks with his wife Keiko on their first vacation in five years. While on their way to their destination in a Runabout, they are stopped by a small Cardassian warship. Allowed to beam over, the Cardassians put O'Brien under arrest on charges of crimes against the Cardassian state. He is taken back to Cardassia Prime to await his inevitable execution.
When the Cardassian occupation of Bajor ended in 2369, the mining space station Terok Nor was left abandoned, its systems ripped out. By invitation of the Bajoran provisional government, Starfleet stepped in to oversee the rebuilding and day-to-day operations of the newly christened Deep Space Nine.
The years of Starfleet's nonintervention into Cardassian matters, however, had taken its toll on relations with the Bajorans. Consequently, Starfleet's position was a tenuous one; many Bajorans, suspicious and hostile as a result of decades of Cardassian oppression and brutality, did not greet the Federation's presence with open arms. The Federation's assistance is put to the test as DS9 becomes a center of travel and commerce that stretches into the Gamma Quadrant.