Fritz has just arrived in a place so secret it isn't shown on any map. Even mentioning its name is forbidden. Mail is censored. Visitors are not allowed. A young boy moves to a remote spot in New Mexico, the site of a heavily guarded government laboratory, which stirs his curiosity. Exactly what are his father and the other scientists working on at the lab? With the help of Kathy, his seventh grade classmate, Fritz searches for clues, and evades bullies who have it in for him. He records each observation and rumor in a notebook he doesn't dare let out of his sight.