Swarek's gone missing and Andy tries to find clues that will help her and the rookies locate him before it's too late. Meanwhile, investigating this case will implicate one officer and threaten Andy's job.
Andy's world explodes by a seemingly senseless act of violence during a concert shooting. When she sets out to unravel the details, she comes into direct conflict with Luke's former partner, Detective Jo Rosati, a new detective with Division 15.+ As Rosati investigates the case, sparks soon fly between her and Luke.
During a routine prison transport, Andy and Sam's frustrations over their strained personal relationship come to a head when the inmate escapes. Dov and Gail search for clues to an amnesiac John Doe. Meanwhile, Detective Barber has Traci and Chris help him recontruct some missing court case notes.
A severe heat waves hits the city along with the possibility of a serial killer on the loose. During a sudden citywide blackout, Andy finds she's on her own when dealing with a vicious predator. Andy also makes an unexpected decision regarding romance that will complicate her life.
Andy ruins an undercover drug sting with a rookie mistake and then attempts to make up for it.
