The mystery of the place and the struggle of a group of people to solve the crimes that pervade Boston in a mysterious fifth season brings the team into the murder of a wealthy woman with cancer coming and leaving only a few months to live. When Mora teaches a class, she meets a man who may be the right master, but torn between doubts of her scientific mind and instinct of her heart. The murder of a rare bookseller brings Jin and Mora to the world of Keltic writings and confessions, just as Mora Jane prepares to meet her new man. Angela's relationship with Cavanaugh changes speed.