Imelda Rivera runs the late-night circle of grandmothers in the human and fay community. Together, they take care of many day-to-day problems that come up when so many humans and supernatural beings live together. But, when a Chicago clan of kobolds turn up seeking refuge from demon gangs taking over there, trouble follows. Yet, demon gangs alone do not fully explain the evil that seeps into their daily lives. Imelda mobilizes the circle of grandmothers to figure out what is behind the terror that comes with the demon gangs. With the help of Ish’niki, the goblin grandmother, Metzli, an Aztec moon spirit, and Josephine, a human grandmother who is more than meets the eye, Imelda races against time to save the young humans and supernaturals from being consumed by the darkness infecting the city. When they try to take what they find to the city government, the mayor shuts them down with false reassurances. This leaves Imelda and the grandmothers no choice but to seek power at the crossroads in the heart of the city to solve this deadly mystery. In the end, Imelda and Ish’niki call on the help of the entire goblin warren to drive the evil away.