Tasked with shadowing a crisis prevention team, Upton finds her approach to policing at odds with the team's mental health clinician. Voight stands by Upton as she continues to struggle in her personal life.
Burgess works an extra shift and gets caught in the middle of a drive-by attack on refugees; the team works together to track down the shooter and uncover the true motive behind the attack.
Intelligence teams up with ASA Chapman to take on an abduction case involving a teenager. The case hits close to home for Voight, leading him to take a personal interest in finding justice for the victim.
As the months long investigation into the serial killer reaches its close, Voight must outsmart the offender in a race against the clock. Upton must make a vital decision.