Alien artificial intelligence has brought humanity onto a galactic tunnel network Finding a match for the top human diplomat on Union Station is another story... Kelly Frank is EarthCent's top diplomat on Union Station, but her job description has always been a bit vague. The pay is horrible and she's in hock up to her ears for her furniture, which is likely to end up in a corridor because she's behind on rent for her room. Sometimes she has to wonder if the career she has put ahead of her personal life for fifteen years is worth it. When Kelly receives a gift subscription to the dating service that's rumored to be powered by the same benevolent artificial intelligence that runs the huge station, she decides to swallow her pride and give it a shot. But as her dates go from bad to worse, she can only hope that the supposedly omniscient AI is planning a happy ending.

You can't hold a book fair without physical books. The Stryx offer EarthCent help in reaching out to the wide-spread human communities, but as usual, it comes with a catch or two. Kelly see an opportunity to increase her book hoard, just as publishing on Union Station begins to take off and Donna's daughters enter a friendly competition. But who will publish the most expensive book of all?

The biggest interspecies business is entertainment, and role playing is making a comeback. While Kelly struggles to come up with a research project to apply for sabbatical, the role-playing craze reaches Union Station, and the Open University offers a for-credit LARP. Dorothy finally finishes her wedding dress with a technical flourish, and Jeeves plots to recoup his costs.

Running a galactic empire isn't easy, and one of the best emperors is calling it quits. On the other side of the galaxy, the Cayl Empire has decided to wind down operations and the Stryx are planning to pick up the pieces. Kelly is tapped to host an open house event on Union Station to tempt the aliens into joining up, but does anybody other than the Stryx actually want the merger to take place?

Is magic just technology we haven't figured out, or is there something more? Emigration from Earth has tapered off, leading to a shortage of cheap human labor on the tunnel network, Daniel attempts to organize a job fair for members of the Conference of Sovereign Human Communities, but the aliens and everybody else on Union Station want in on the action. Kelly decides that it's time EarthCent begins documenting the history of the diplomatic service and begins her own search for a historian, while the employees of SBJ Fashions try to deal with rapid expansion by outsourcing and hiring new employees, but can Baa find a human with enough magical talent be her apprentice?

The alien diplomats are finally willing to talk to the ambassador. They must want something. Five years after the events of Date Night on Union Station, Kelly has settled into married life and her job as the EarthCent ambassador. The only fly in the ointment is that most of the aliens on Union Station refuse to talk to her. But a mysterious new game is sweeping the galaxy, changing the balance of power between species and bringing game-savvy humans front-and-center. As the invitations to diplomatic functions pour in, Kelly finds herself struggling to understand exactly what's going on, not to mention finding babysitters on short notice. Fortunately, diplomats and alcohol go together like, well, diplomats and alcohol, and Joe has started micro-brewery business in Mac's Bones. The only thing left that could go wrong is a visit from her mother.

Can humanity remain an independent species or are we ripe for a takeover? Kelly heads to Earth for the first ever Conference of EarthCent Ambassadors in Manhattan, but while the cat's away, the mice will play. The cat has its own problems, as some of the people remaining on Earth don't believe in aliens, unless they're the blue type that appear in romance novels.