THE CITY DARK chronicles the disappearance of darkness. When filmmaker Ian Cheney moves to New York City and discovers skies almost completely devoid of stars, a simple question — what do we lose, when we lost the night? — spawns a journey to America’s brightest and darkest corners. Astronomers, cancer researchers, ecologists and philosophers provide glimpses of what is lost in the glare of city lights; blending a humorous, searching tone with poetic footage of the night sky, what unravels is an introduction to the science of the dark, and an exploration of the human relationship to the stars.