Sally Jansen was NASA's leading astronaut, until a mission to Mars ended in disaster. Haunted by her failure, Jansen now lives in semi-retirement, convinced her days in space are over. She's wrong. A huge alien object is now poised above the Earth. It has made no attempt at communication. NASA wants Jansen to lead an expedition to the object. It's the one shot at redemption she always hoped for. A tense and thrilling science fiction adventure.