Identical twins Melina and Gillian Lloyd haven't considered switching places since childhood. So when Melina proposes that Gillian take her place as a media escort to NASA astronaut Col. "Chief" Hart, she refuses . . . at first.

The following morning Melina receives terrible news: her sister has been brutally murdered -- and Chief, though innocent, is the prime suspect. He and Melina are determined to find the killer, a megalomaniac who's nearly unstoppable -- and out for blood.

Now, with targets on their backs, they must work together to learn the truth behind Gillian's death -- before they become the killer's next victims.