A unique mash-up of hard-boiled detective noir and Lovecraftian horror. Chicago. The Roaring Twenties. When private detective Brennan O'Sullivan is hired to investigate the mysterious death of a reporter, he follows his only lead - a jagged, cryptic symbol - and this will put him on a trail that will lead him to nightmarish visions, ghastly murders, and unknown horrors lurking at the edges of reality.