Sally Jansen was once NASA's leading astronaut, but her final mission ended in disaster. Haunted by her failure, Jansen now lives in semi-retirement, convinced her days in space are over.
A large alien object has entered the solar system and is now poised above the Earth. It has made no attempt at communication and has ignored all incoming transmissions.
At NASA's request, Jansen must lead an expedition to the object in the hope of discovering its purpose. For all the dangers of the mission, it's the one shot at redemption she always hoped for.
Yet when K-Space, a powerful corporation, launches its own rival mission intent on claiming ownership of the object and whatever lies within, what began as a mission to make First Contact becomes a desperate race against time.
As the object reveals its many mysteries, one thing becomes clear--the future of humanity lies in the hands of Sally Jansen. The last astronaut.