DS9 Season 7 Episode 1 Image in the Sand

Plot

On Deep Space Nine, Kira has recently been promoted to the rank of Colonel. A cult worshipping the Pah-wraiths is gaining strength in reaction to the closing of the wormhole. Meanwhile, the Romulan Empire establishes a delegation on the station, led by one Senator Cretak. Cretak asks Kira to petition the Bajoran government to allow the Romulans to set up a hospital on the uninhabited moon of Derna. Later, security chief Odo reports the Romulan hospital is turning away wounded Starfleet personnel, and appears to be heavily armed. Kira demands that the weapons be removed immediately, but Cretak refuses.
Worf is frustrated that the USS Defiant is assigned to nothing more dangerous than escorting cargo runs. He confides in Chief O'Brien that he is worried that Jadzia won't enter Klingon heaven, Sto'Vo'Kor, because she didn't die in battle; the only way to ensure her place in Sto'Vo'Kor is by winning a glorious battle in her name. General Martok recruits Worf to join a dangerous mission that will ensure Jadzia's place in Sto'Vo'Kor; O'Brien and Dr. Bashir decide to accompany him.
Meanwhile, Benjamin Sisko is taking extended leave on Earth. He separates himself from his family, doing nothing but playing the piano in his father Joseph's restaurant; his son Jake is worried about his father's attitude. Benjamin experiences a vision from the Prophets: he sees himself digging frantically in the sand on the planet Tyree, and uncovers the face of a woman whom he does not recognize. Joseph eventually reveals that the face belongs to Benjamin's biological mother Sarah, who abandoned the family when Benjamin was a year old and later died. Joseph also gives Benjamin a necklace of Sarah's, which has ancient Bajoran writing on it reading "Orb of the Emissary"; Benjamin decides to travel to Tyree to search for this Orb. The next night, he is attacked by a member of the Pah-wraith cult, attempting to prevent him from finding the Orb; after he heals, Joseph and Jake decide to go to Tyree with him. As they are about to leave, a young Starfleet ensign, a Trill, who Benjamin does not recognize, arrives and introduces herself as "Dax".