The idea is that ghosts stop going to wherever they go. The energy that makes them up sticks around the earth and causes lots of problems. The government has set up machines that help dampen these ghosts.
The story focuses on a police officer, well she is a detective exorcist, who is investigating some weird occurrences regarding ghost bombs. She is a by the book cop, who may or may not have snitched on some cops for beating up immigrants. The city is on the verge of a riot, which serves as an interesting backdrop.
This book was my first Radical Comics series, and I have to say, I am highly impressed. After reading some of the previews of their other books, I may have to check some of them out. At this point, with more and more crap coming out of Marvel and DC, it is nice to see some of the smaller publishers trying to put out interesting material.