When a Jem'Hadar strike force attacks the station, Sisko takes Worf, Dax, Odo, and O'Brien with the U.S.S. Defiant and pursues them into the Gamma quadrant. The crew comes upon a disabled Jem'Hadar warship emitting a distress signal, and transports aboard the survivors. Weyoun, the Jem'Hadar's Vorta master, reveals that they were attacked by the same Jem'Hadar who surprised Deep Space Nine. The attackers are Jem'Hadar renegades who turned against the Dominion, and may have an extremely powerful weapon in their possession. Forced into an alliance by this new threat, the Jem'Hadar and the crew of the U.S.S. Defiant must stop the rebels and destroy their weapon.