The expedition ship Kepler races to Pluto, intent on uncovering the secrets of the alien structure recently discovered under the ice. Computer scientist Lea Santorin can't wait to figure out the alien technology. Instead, she wakes it up ... and it continues its long-interrupted journey across the galaxy, taking Lea and Kepler with it..

And something strange also wakes in Lea. She hears voices no one else can, and sees things the mission command prefers hidden. Why bring so many soldiers along with the scientists? Who concealed the structure, and when?

Who waits at the final destination...and will they survive the meeting?