Several patients are discovered to have the same rareinfection, prompting Dr. Charles' daughter Robyn, anepidemiologist, to be brought in to find the common link. Dr.Choi and Dr. Rhodes work on an elderly man who is discovered tobe very ill, but a conflict in how to best treat him developsbetween his son and his young girlfriend. Meanwhile, Dr. Reesetries to help a young drug addict, and Maggie tends to apatient who is dear to her heart.
