The Baltimore detectives are working overtime on the Redball investigation of "Samaritan of the Year" Catharine Goodrich's murder. New Shift Commander Megan Russert heads the Redball investigation and Giardello is called in to oversee the investigation. Meanwhile, Beau's wife kicks him out, leaving Felton to break into his own house to pick up some clothes. Exhausted by dead-end leads, Russert goes home. Felton shows up, ostensibly to give her information on a suspect, but in fact they are having an affair.

As Pembleton digs deeper into the investigation, a witness, "Pamela" Wilgis, shows up. Pembleton knows Wilgis is the murderer, but when he confronts her with the evidence, Wilgis claims to have multiple personalities. Later, Pembleton, Giardello and Russert must stand by as Wilgis publicly confesses to the murders on television. Meanwhile, Felton decides to give his marriage a second chance, and he and Russert end their affair.