Sisko's girlfriend is found to be aiding the Maquis.
Starfleet plans to send industrial replicators to Cardassia after Klingon attacks, and Eddington and Odo suspect that Sisko's girlfriend, Kasidy Yates, is helping the Maquis. Sisko follows her ship to a meeting with the Maquis, and she says she has only been delivering medical supplies.
It was a ruse to lure Sisko away from the station. In his absence, Eddington, revealed as a Maquis agent, steals the replicators, knocks out Kira and defects. Kasidy turns herself in. Meanwhile, Dukat's daughter Ziyal tries to befriend Garak, who fears that she has been sent to kill him.