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 course.

Aided by cutting-edge technologies, the NASA investigator and scientist turned Space Force pilot sets out on a frantic search for the missing link between the sabotaged rocket launch and her predetermined destiny...a search that someone else seems very interested in stopping.

From NASA to the Chase family farm, to the White House to distant orbits of space, Calli plays a high-stakes game of hide-and-seek with a cunning and ruthless adversary. One wrong move will unleash cataclysmic consequences reaching far beyond the boundaries of Earth.