In 2013, amid the Syrian Civil War, ISIS moved into the city of Raqqa, Syria. Militants overran government loyalists, seized control of the square and declared the city under their control. After that, ISIS began an insidious campaign of propaganda, public execution, media control and jihad-fueled oppression. In this treacherous atmosphere, and at enormous risk of their lives, a group of citizen journalists banded together with a mission to tell the world about the outrages unfolding in Raqqa. They call themselves Raqqa is Being Slaughtered. Silently — and with cameras, computers, savvy and a network of astonishingly brave individuals — they defy and frustrate ISIS by continuing to tell the world about its affronts to humanity. With incredible access to this gut-wrenching story, filmmaker Matthew Heineman (Cartel Land, Mountainfilm 2015) proves once again to be a fearless and potent storyteller. Equal parts devastating and courageous, City of Ghosts will shake you to the core.