Tommy and the LAPD race to find an online "swatter," a digital criminal targeting the LAPD and a rising online gamer by making dangerous fake 911 calls. As Tommy deploys the department's full resources to the search, the perpetrator threatens to reveal private information about members of the police force.

Tommy is accused of professional impropriety when her relationship with sports agent Kiley Mills intersects with the LAPD's arrest of a local sports phenom found possessing an illegal firearm. Also, Blake's search into the disappearance of a reporter who asked her for a favor uncovers a connection to the city medical examiner's office.