‘The CPS will have to be told. We’ll need to take a statement from you, saying where you were and why you didn’t come forward. Then they will take him to a magistrate to secure his release.’

I shiver at the thought of what Ian has been through. I despise him for the way he treated me, but I know how I felt when I thought I was his murderer and was going to prison for a long time. How much worse to be arrested, knowing that despite all the things you had done, this was the one thing that you hadn’t.

‘So Thea and Garrick wanted me to believe I had killed Ian just so that they could control me?’

‘I assume so. If you thought you were wanted for murder you would stay with them – possibly forever. They probably chose you because you were going through a tough time. From what we know of them, that seems to be their modus operandi – to seek out vulnerable young women.’

The thought of the Facebook post that had lost me my job and drove me to staying with them springs into my head.

‘I always thought the Facebook post that got me the sack had been written by Ian – an act of revenge because I was going to throw him out. And if it wasn’t him, I thought it might have been a man I met on the boat in Myanmar, although I couldn’t think why he would do such a thing. It never occurred to me to suspect Thea, even though I found her waiting for me in my cabin more than once. I didn’t think she would know how to use Facebook.’

The inspector raises her eyebrows and I realise how naive that thought was.

‘I’m sorry, Callie, but I think you were targeted from the start. I can’t tell you much about our ongoing investigation, but after they managed to convince you that you had killed Ian, what did your daily life consist of?’

I think back to the brief time I was in the cellar and the devastation I felt. For the first time I begin to imagine how the other two must feel after months of living there, so I tell Becky about the drugs I’m sure we were given, although fortunately for me I wasn’t on them long enough to become addicted. I talk about the cleaning, the ironing, taking care of the couple. I don’t tell her about the doctor and the treatment sessions, though. Especially the last one. I will have to, I suppose, but I’m not quite ready. Every now and again, through the mist of my anger and revulsion at everything that happened, I see Thea’s kind face on the boat as she helped me through such a dreadful time.

And then I think about Hannah and the other woman.