Stardate 49665.3: A bad dream, in which he sees a battle between Starfleet and the Klingon Empire with many lives lost, wakes Worf in his holding cell on Deep Space Nine. He has been charged by the Empire with destroying a Klingon freighter while in command of the Defiant during a battle. The Empire is seeking to extradite the Starfleet officer to Qo'noS for trial.
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.