The story centers on Rachel Manners, a 35 year old astrobiologist. She is a member of an elite group of scientists, chosen to embark on one of the most critical missions ever conceived on Earth. Now Rachel is alone, orbiting an unknown planet. Her only companions are J.U.L.I.A., the space probe's artificial intelligence and Mobot, a huge reconnaissance robot. Together, this unlikely trio will explore the mysteries of this solar system. But are they prepared for what they will find?