A month after Voight's close brush with death, Intelligence is overwhelmed with cases as they catch a high-stakes drug bust.
Assistant State's Attorney Chapman assists Intelligence with a sensitive investigation that drudges up painful memories for Voight.
A waitress from a trendy New York restaurant is sexually assaulted at an after hours VIP party.
Tasked with shadowing a crisis prevention team, Upton finds her approach to policing at odds with the team's mental health clinician. The case brings out Upton's personal struggles, Voight stands by her.
As the months-long investigation into the serial killer reaches its close, Voight must outsmart the offender in a race against the clock.