The detectives must piece together partial clues to lead them to the murderer of a husband-and-wife team of psychiatrists. Jane finds herself closer to the investigation than she realizes. Also, when the Boston Police Department hosts a seminar for Medical Examiners, one of the attendees, offers to help Jane and Maura on their case. Meanwhile, the Rizzolis have their hands full when they discover there may be a link to a pregnant stranger they've met.

A boy band star returns to his roots for a show and winds up murdered. Jane and Frankie, who grew up with the victim, work hard to solve the case. Meanwhile, Jane and Maura must decide if it's time to tell Angela the truth about Lydia's pregnancy just as Angela prepares to throw her a baby shower.