"The Way of the Warrior" is the fourth season premiere of Star Trek: Deep Space Nine. Following a surprise drill aboard Deep Space 9, Kasidy Yates remarks to Captain Benjamin Sisko during a romantic dinner that there have been some changes on DS9, including a lot of "maintenance" being done on the station. Sisko is secretive, but hints that the crew is preparing a few "surprises" in case the Dominion decides to attack. The recent revelation that Changelings have infiltrated the Alpha Quadrant has caused a large amount of unrest, and the Cardassians have responded by sealing their borders.
Later, Sisko grants shore leave aboard the station to General Martok and his battalion of Klingon ships. The Klingons act suspicious and paranoid. Martok proclaims that the Klingon fleet will remain in Bajoran space to counter the inevitable Dominion attack. Odo ultimately breaks up an altercation between Morn and the Klingons. Later, the lead Klingon, Drex, and his thugs ambush and beat Elim Garak in his tailor shop. As Doctor Bashir mends Garak's broken bones, Garak wonders why the Klingons are suddenly so hostile towards Cardassians. Realizing something must be done before the situation escalates out of control, Sisko notifies Starfleet Command and Lieutenant Commander Worf is dispatched to the station. Sisko gives Worf an assignment – find out what the Klingons are up to.