It's Breast Cancer Awareness Weekend at the Rittenhouse Hospital Women's Clinic and Lu, Lana and Peter are hosting a dance-a-thon and a free mammogram clinic. After one woman's mammogram reveals a lump, Lu tries to intervene to help her keep both her breast and her job. Meanwhile, Dana discovers some unexpected results of her breast cancer clinical trial and soon learns the very disease that's defined her career has now hit too close to home.