Jennifer Cahill only meant to drop off a message. Instead, she walks straight into the sound of a gunshot-and into the path of a killer. With no training and no time to think, Jennifer is pulled into a deadly chase through the streets of Chicago. Every clue drags her deeper into a tangled web of lies, danger, and betrayal. The police need her help-but trusting the wrong person could cost her life. What began as an ordinary day is now a fight for survival. And the killer is always one step ahead.