Benny is going to the Moon. One of many twelve-year-olds chosen by the eccentric and rich genius Elijah Wright.
He makes friends, enjoys wonders, helps search -- and learns, with some other kids, that something's been hidden from them.
Unraveling that involves things from the buiding's AI being based on a real woman, unknown elements, one girl making strategic decisions, a holographic spider, Benny's knowledge of what to do in a sand storm, and more.