When a serial rapist is on the loose, Captain Conrad orders Gideon and Murphy to find the perpetrator before there are any more victims. However, after Gideon's new technology fails to prove helpful for the case, the team is forced to turn to an unexpected ally for help. Meanwhile, Ada struggles with a threatening part of her past and worries that if it resurfaces, it may be harmful.
After witnessing his best friend's murder first-hand, genius tech billionaire Gideon Reeves, decides to do something about it, putting up millions of dollars of his own money to take over the troubled 13th Precinct. When he reboots it as a private police force it challenges the whole district - including the ambitious Officer Amelia Murphy - to rethink the way to fight crime: better, faster and smarter than anything seen before.
Inspired by true events, APB is about the Chicago Police Department spiraling out of control amid sky-high crime, officer-involved shootings, cover-ups and corruption.