A desperate Kat realises Eilidh's close bond with Sir Douglas means she would be the only person who can find out the truth of what happened the night Lady Mary was murdered. But with no love lost between herself and Eilidh, can she convince her to help?

Kat investigates deep into Eilidh's past to uncover something that she hopes will make her waver. 
In a tense final exchange, Sir Douglas and Kat finally come face to face, as she confronts the demons of her past in an attempt to bring Lady Mary's killer to justice.