Scott and Archer diagnose a pregnant woman with a serious infection. Maggie receives shocking news. Halstead and Charles question an elderly patient’s Alzheimer’s diagnosis. In an effort to help a patient, Marcel takes a risk.

Halstead and Asher clash over a patient in need of a kidney transplant. Marcel faces a tough decision when Blake is in surgery. Choi and Archer treat the son of Med's general counsel. Med's family grows.