Commander Sisko is warned by the prophets in a vision, of the fatal consequences, if he leaves Deep Space Nine and leads an alliance of Federation, Klingons and Romulans, in the attack of Cardassia Prime and Gul Dukat is possessed by the Pah-Wraith and intends to unleash vengeance upon Commander Sisko, The Bajorans and the Federation, by destroying the Bajoran wormhole and Lt. Jadzia Dax is mortally wounded by Gul Dukat.