The detectives search for a serial killer who justifies his crimes with paranoid religious motivation set on by a rapidly deteriorating medical condition.
Kidd tries to connect with a troubled teen interested in Girls on Fire; Violet and Novak attempt to figure out why a bodybuilder passed out at the gym.
Suspicious relationships emerge between "The Dr. Phil Show" and its preferred treatment facilities; one family's trust in TV help lead to years of suffering.
Lieutenant Casey gets pressured to cover up for a drunk driver who is the son of a dirty cop; Severide learns that he has a fractured vertebra in his neck.
Chief Boden faces allegations after leaving a homeless man to die in a warehouse fire; Detective Voight continues to intimidate Casey about testifying.
The detectives encounter problems with a traumatized sexual assault victim, who is able to perfectly recall the entire incident except for the assailant's face.