Kellerman assures Lewis that he is seeking some professional advice; he also takes some time off. Lewis is assigned to work with Pembleton and neither is happy with the situation. Together they investigate the murder of a wealthy woman. They suspect the brother may have had a touch of sibling rivalry. Meanwhile, the brother insists that the police have stolen his sister's diamond ring. Mary tells Frank that she thinks they need to talk to a marriage counselor. Cox investigates whether the missing diamond ring might have been taken by one of her staff. She gets Brodie to help her add some video surveillance to the morgue. Mary asks Tim to be Frank's partner again.

Julianna wins the recognition of her peers. At dinner, Julianna and her colleagues swap stories about how they've cracked cases. Julianna relates a story that happened a few weeks earlier, a suicide might actually be turn out to be murder, when it is determined that the victim was shot in mid-jump. A bickering elderly couple proves to be the key to the crime. Meanwhile, Falsone investigates the legal possibilities of obtaining custody of his son. Ballard and Gharty investigate the death of a drug dealer, which takes them up into the hills of western Maryland in search of their suspects. Georgia Rae Mahoney sues Stivers, Lewis, Kellerman, Giardello, Cox, the department and the city for the wrongful death of her brother, to the tune of $60 million. Lewis confronts Georgia Rae and winds up with a suspension for his trouble.

When the men are nowhere to be found, Sheppard and Ballard team up to investigate the death of young girl, who's a teenage gang member. With the wedding one week away, Billie Lou asks for Munch's help with her neighbor's abusive boyfriend. After Munch approaches him strongly, the boyfriend retaliates by coming to the Waterfront and slamming Billie Lou's head on the bar. Munch claims he came on strong with the guy, because his ""testosterone riddled behavior"" was due to the celibacy Billie Lou imposed on him, to make their wedding night more special. Billie Lou wants to delay the wedding until the welt on her forehead goes away in about 3 weeks. After Sheppard and Ballard solve their case, Sheppard reminds Lewis that his problem with her is not going to keep her from doing her job.