Sisko is joined by an old friend as he searches for the mysterious Orb of the Emissary, but the Pah-wraiths send a vision to distract him. On DS9, Kira mounts a blockade around a Bajoran moon after discovering the Romulans have armed their hospital there. Aboard the Rotarran, Worf leads a mission to destroy a Dominion shipyard in order to honor Jadzia.