On the first day of Paddy’s murder trial, Maura gains insight into her father from Hope. Korsak opens up about Cavanaugh’s tragic past. And in an unexpected twist, Maura must decide which side she’s on when she and Jane unravel a shocking secret about Paddy and Hope that affects them all.

Jane and Maura are brought into the world of Keltic writings by the murder of a rare bookseller; Angela's relationship with Cavanaugh changes and Maura prepares Jane to meet her new man.