Major Kristina Lutz fell in love with Lieutenant Colonel Eric King as they worked together on the software they developed, Caelus. When Kristina finds out Eric feels the same way, shouldn't everything be perfect? Wrong. Let me tell you how Kristina and Eric met. Eric is married to Kristina's sister Rachel, who ran out on Eric and have been apart for a year. What will happen when the Caelus mission fails, and the team falls through the Earth.