Captain Calli Chase races against time to thwart a plot that leaves the fate of humanity hanging in the balance in this new thriller from international bestselling author Patricia Cornwell.In the aftermath of a NASA rocket launch gone terribly wrong, Captain Calli Chase comes face-to-face with her missing twin sister—as well as the startling truth of who they really are. Now, a top secret program put in motion years ago has spun out of control, and only Calli can redirect its