Erin reopens an 18-year-old rape case, in which Frank was the original arresting officer, while Danny and Jackie investigate the murder of three teenagers.
Zoe Brant, an imprisoned felon and former drug user, is a lead suspect in the of killing Bryn Walker, an expert equestrienne who ran a vocational program for inmates.
Nichols and Stevens attempt to get to the bottom of a 22 year old mystery, and their investigation leads them to four best friends who were with a man on the night he drowned.
Samantha's accessory obsession causes friction with an important client, and Carrie's relationship with Aidan progresses.
Mysterious emails from a religious website lead detectives to the dead body of one of the page's creators; Jack McCoy's political opponent uses the media to attack his reputation.