Something is rotten in Langrenus. Or technically, north of the city. Bob has settled down into work and family life but beneath the surface things have changed. He's a secret agent now, building a budding network of people searching for the alien shadow groups on Earth and working to stop the coming alien invasion from beyond the solar system. But for now, all of that is far away. The Boss, the mysterious head of Vartan, Inc. sends Bob back to the moon city of Langrenus to investigate the Transient Lunar Phenomenon, which has changed pattern and intensity over recent years. No one knows why. At first, Bob suspects he's been sent on a fluff mission. But the more he investigates, the more questions are raised in his mind as to what is really going on. The heart of the problem lies within the lunar mining communities and the increased frequency of the beautiful lunar lights are the result of something far more sinister than Bob ever imagined.