A serial killer is working his way through Chicago. His victims have nothing in common except being pregnant. Detective Rebecca Foxx of the Chicago Detective Division has her hands full trying to catch the murderer before he kills again. She has enough pressure without the overbearing FBI butting in.
FBI Special Agent Jordan Gray isn't sure what she is in for when a midnight call brings her to her boss's office. She asks her to take an assignment off the records. Investigate the attack of her partner, but don't let anyone outside her office know.
It soon becomes obvious that Rebecca resents the FBI's intrusion and it seems Jordan's personal attention. With no breaks in the case, she is forced to accept the FBI's help, but she'll be damned if she is taking anything else from Jordan.
What follows is a series of missteps and twists and turns that leaves both women wondering if they will ever catch the killer and trying to figure out how to keep their feelings for each other from becoming a distraction.