When human remains are discovered in the world's largest chocolate bar, a "sweet" event for a candymaker quickly turns bitter. The team soon discovers that the victim was a mysterious character whose past is full of secrets, lies and love affairs. Meanwhile, Cam struggles with her daughter's decision to attend a university that fails to meet her high standards, and Hodgins asks Angela to arrange a party to announce her not-so-secret pregnancy.

Brennan gets a glimpse into her own life when the body of a brilliant and career-driven surgeon is found in a rough neighborhood with multiple fractures in her skull and no indication as to how or why she was there. While the team investigates the case objectively, Brennan struggles to separate her own life from the victim's as she perceives many parallels between them the more she learns about the victim's past.