In our universe a Cardassian sleeper agent called Iliana Ghemor was once surgically alltered to resemble & replace Bajoran resistance fighter Kira Nerys. That plan never reached fruition & the fate of the agent remained unknown -- until now. Robbed of the past sixteen years & on the brink of madness Iliana Ghemor is back with a vengeance. She has already made one attempt on the real Kiras life & now the Deep Space 9 crew must somehow must stop the false Kira without derailing the delicate flow of history that must unfold if two universes & countless others are to survive.