Three murders in Chicago bring back bad memories for Morgan of his abusive childhood, the man who attacked him may be behind the killing.
Callie has doubts about trusting AJ. Meanwhile, Stef reveals surprising news about Monte and Jude has a difficult time getting over the shooting incident.
An affluent woman is discovered dead at the bottom of her stairs; Maura has some minor surgery and reconnects with Hope.
In the second-season opener, Adam takes the next step in his blossoming relationship with Dana by creating a mix tape for her, but the tape falls into Beverly's hands instead. Elsewhere, Barry gets caught with a fake ID.
A viral outbreak threatens the staff and patients of Angel's Memorial Hospital, leading to a quarantine.