The Astronaut plot
When astronaut Sam Walker returns from her first space mission, she is miraculously found alive in a punctured capsule floating deep off the coast of the Atlantic Ocean. Her adopted father, General William Harris, places Sam under NASA surveillance in a high-security house isolated in the woods. Sam is reunited with her husband Mark and appears to prepare for her next mission. However, when disturbing events occur around the house, she fears that something extraterrestrial has followed her to Earth and that the agencies charged with protecting her are endangering her life. Even those close to her cannot be trusted.