She took an oath to uphold the law, but oaths can be broken. Chicago PD Detective Shannon Rourke is falling apart, but by now, she’s used to it. Her misfortune, however, has infected the people she loves. Her boyfriend worries she's concealing a dark secret, and his daughter is tormented by memories of a deranged serial killer—who targeted the girl because of Shannon. She needs a break from work before she snaps, but her problems have to wait when she’s called to a puzzling crime scene on Chicago’s deadly West Side. With a killer dropping fresh corpses every day, she fights to keep her demons shackled while she goes on the hunt. A single misstep could turn her misfortune into deadly tragedy—not only for herself, but for the family she loves.