Each year, one billion birds perish crashing into North American buildings. In Chicago, the towering glass skyline intersects a major migration route. The Chicago Bird Collision Monitors work tirelessly before sunrise to rescue injured birds. Their mission is to protect these remarkable creatures caught between urban development and their ancient flyway.

'Lights Out' follows these dedicated volunteers as they patrol downtown streets, saving stunned survivors and collecting fallen birds for research. Through their work, rehabilitated birds continue their amazing spring and fall migrations while those lost to window strikes help scientists find solutions to preserve future generations of migrating birds.