A strange formation is seen in the sky over the sleepy suburbs of Tinley Park. The lights return for a second time almost to the date the following year. With more than 70 witnesses each year, these are some of the most well corroborated sightings in the history of the United States. Annually, Illinois receives more than 300 reported UFO sightings, so why are the Tinley Park sightings the only reports that happen en masse? What could our cosmic neighbors want with one of the safest cities in America? And why is Homewood, a town less than 10 miles from Tinley, the only county in Illinois to have zero reported sightings?