Jennifer Cahill inadvertently ends up on a wild ride through the streets of Chicago and area, working with the police to track down a killer. Will Jennifer's lack of experience help or hinder the police investigation?

As Jennifer is getting ready to pack up for the day from her administrative job at the Chicago Police Department, the Lieutenant asks her to relay a message to a detective who hasn't checked in since leaving the precinct earlier that morning. Detective Marsden went to inform Kyle Granderson that his wife was found dead the night before in a nearby park. When Jennifer arrives to deliver the message, she hears what sounds like a gunshot go off inside the house.