KATE FOSTER is Chief Mission Engineer for NASA’s Project Heat Wave. While orbiting the Earth, its sophisticated equipment tests the use of high levels of microwave energy as an alternate power source for industry and communities. But terrorists attack the site, killing members of the team and stealing a computer memory stick that allows them to control the satellite's energy and use it as a deadly weapon against innoncents on the ground. Kate, with the help of Daniel Rooker (a counter-terrorist expert), the police, Homeland Security, the FBI and the Italian Carabiniere, must must force herself to extraordinary physical and emotional limits to stop the man who is ultimately behind the extortion plot -- earning him billions of dollars in return for the safetry of American citizens.