A brutal storm rocks Chicago; Halstead encourages Dr. Grace Song to go against her own findings for the benefit of their patient; Asher rushes to the hospital to help Archer's pregnant patient; Maggie's concern for Ben consumes her.
Med runs out of scrubs, forcing the staff to improvise; the life of Archer's son is in danger; Marcel and Charles help a kidney transplant patient experiencing psychosis; Asher and Halstead grow closer.
Scott suspects his patient may be a drug dealer; Halstead must decide how to spend his whistleblower settlement; Charles and Taylor help a patient who believes she's infested with parasites; Marcel and Blake are paired with an arrogant surgeon.