Maxwell is living a nightmare when he begins to question whether his fiancée Imogen

is his own sister - separated by adoption. Worse, he fears that she may already know

that she is, and is marrying him anyway. A visit to her birthplace in Cambridge stirs up

some déjà vu that confirm Maxwell's troubles.

Former DCI Morris Keene languishes at home, struggling with a debilitating injury.

DI Chloe Frohmann's new partner is all too willing to believe the worst when Morris'

daughter Dora is accused of assisting a suicide. Buried skeletons discovered next to an

old barn link the suicide and Imogen's childhood, revealing horrors in the past and

triggering danger in the present.