Susan and Carter attend a yoga class before work and discover an outbreak of meningococcus. Abby discovers that Luka had Nicole hired as a runner, even though she doesn't know what she's doing, and flirts with a fireman with a broken leg. Carter and Abby discuss their relationship. Corday continues to be shadowed by Infection Control and looks for a pattern after her fourth post-op sepsis death. She discovers that an official investigation has been launched into her being an "angel of mercy" and the police will be contacting her. Corday also fights with Rachel upon discovering Ella unattended. Benton tells Roger that he doesn't want him having any more contact with Reese. Luka treats a young man using his portable catheter for heroin injection. Benton and Abby treat a kid who tried self circumcision to please his girlfriend.