When a lightbulb falls in a Chicago subway tunnel, it releases a pathogen that could kill millions. While the mayor postures, people begin to die, especially on the city's grim West Side. Finally, the government acts, sealing off entire sections of the city - but are they keeping people out or in? Meanwhile Chicago cop turned private investigator Michael Kelly hunts for the people who poisoned his city, taking him into the tangled underworld of the...