Stardate 52152.6: Three months after Jadzia was killed and the wormhole closed, Sisko, now working in his father's restaurant on Earth, has a vision of uncovering a woman's face in the sand on the planet Tyree. This woman turns out to be his real mother, Sarah. A locket that belonged to Sarah shows an old Bajoran inscription which hints to a yet unknown Orb of the Emissary. Despite an attempt on his life obviously by a member of the Pah-wraith cult, Sisko goes searching for this Orb, together with his father Joseph, his son Jake and Ezri, the new Dax host. Meanwhile, the Romulans establish a hospital complex on the Bajoran moon Derna, but also install plasma torpedoes there. Worf is eager to undertake a dangerous mission to allow Jadzia to enter Sto-vo-kor. On the planet Tyree Sisko discovers the Orb of the Emissary. The Prophet from the Orb enters the wormhole and expels the Pah-wraith. Kira's blockade against the Romulans succeeds, and they remove their weapons from the Bajoran moon. Worf and Martok, accompanied by Bashir, O'Brien and Quark, successfully destroy the Dominion shipyard at Monak IV by triggering a solar flare.

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