As the film’s title implies, the Syrian city of Raqqa is a shadow of its former self. Bombs, airstrikes and other violence have leveled buildings and made specters of its citizens. This documentary follows a group of anonymous citizen journalists and activists who dedicate themselves to exposing ISIS violence and terrorism in the once-vibrant city.

The activists have seen friends and relatives killed in uprisings, and struggle with their emotions as they flee to other countries to avoid danger. Using blogs and social media, they share stories, videos and photos with the world despite the risk to their own lives. ISIS knows their names and delivers threats wherever they go, but the group remains undaunted. One activist sets the tone for the film by stating, “Whoever holds the camera is stronger, and the pen is mightier than the sword.”

The English-subtitled City of Ghosts makes its anti-terrorism point convincingly, providing a raw glimpse of what it’s like to stand up against violence. It’s directed by Matthew Heineman and has received recognition from the Sundance and Dallas International film festivals, among others.

Should you see it? Yes, its message is important.