Kira and Bashir are returning from the Gamma Quadrant when their craft is hit by a plasma leak. As they return to their Quadrant, they are greeted by the Klingons that take them to the DS9. There onboard, they meet another Kira who is in charge of the station. It soon becomes clear that they have transferred into the Mirror universe. Once on board, Kira finds out that the Cardassian and Klingons have become allies. Bashir is sent off to do some Ore Processing. Bashir makes an attempt for escape during an incident in processing. He is captured but rescued by Sisko who take him and Kira to their craft to escape. Kira had been given free run of the DS9.