From the introduction:
Spies, defectors, refugees… there are thousands of cast-offs from the galactic cold-war, and unfortunately you’re one of them. Fortunately for you, the Interplanetary Union is willing to protect you from the chilly grasp of the Communion. Unfortunately for you, the only thing left to do is hide. You’ve been placed in a remote section of a backwater planet called Earth, and disguised as one of their natives.
You’ve been disguised as a worker at a little diner in a place called Evansville, Indiana. The year, according to the local calendar, is 1955.
Now all you have to do is blend in, and hope that the Communion doesn’t come looking.