Dr Emma Watson's lifelong dream of working and studying aboard the International Space Station has finally come true. But it quickly becomes a nightmare when a culture of single-celled organisms begins to regenerate out of control--and infects the crew.
Emma must contain the outbreak and prevent as many deaths as possible while, back on Earth, her estranged husband is frantically working with NASA to bring her home. But with a contagion threatening all of humanity, there will be no rescue.
