Desmond Gray

Dr Manning and Dr Marcel disagree over an abusive husband. Dr Halstead struggles with ethics and his decision to work at the safe injection site. A misdiagnosis that may change a family's life is revealed by Dr Charles and Elsa.

Firehouse 51 responds to the scene of a harrowing blaze that endangers the lives of many, including one of the Chicago family.

Halstead is criticized for making an unauthorized move to treat his pregnant patient, and Choi becomes personally invested when treating a homeless veteran. Meanwhile, Rhodes and Bekker deal with a patient who desperately needs a liver transplant.

After a major accident at O'Hare, the ED is concerned one of their own is in mortal danger. Will's proposal for a safe injection site goes to the board for consideration. Meanwhile, Natalie and Goodwin become concerned for Gwen.

Marcel helps Blake replace a patient's liver; Taylor tries to prove herself; Halstead continues to pursue the truth about Cooper; Choi gets closer to returning to life in the ED.

Halstead runs into trouble when one of his trial patients falls ill; his own stress and symptoms have Choi struggling to get through the day.