Lillian, Ohio is a fictional town of about 12,000 people in the state of Ohio in the United States of America. In 1979, a U.S. Air Force train derailed and a captive alien was freed. The creature then roamed the town, stealing mechanical equipment and kidnapping people. The Air Force occupied the town and ordered an evacuation (by cover of a wildfire) for "Operation Walking Distance." Many buildings were destroyed in the battle to recapture the alien.
The town has the average amenities of a small Ohio town: school, factories, gas stations, and restaurants. It also has a sheriff's office with a staff that attempted to solve the mystery behind the train crash.