Kira finds out she is a Cardassian agent, or so she is told.
Kira is abducted and wakes up on Cardassia looking like a Cardassian. Entek of the Obsidian Order says she is a sleeper agent named Iliana Ghemor, altered to look Bajoran and given false memories, and Legate Tekeny Ghemor greets her as his daughter.
Kira rejects the story, but doubts grow, and when Ghemor offers to help her escape, she realises the whole plan was staged to expose him as a dissident. Sisko, Odo and Garak arrive to rescue them, and Garak shoots Entek. Back on the station tests confirm that Kira is Bajoran, and Ghemor still hopes his real daughter is alive.