They say blood is thicker than water. I say blood is just harder to wash off your hands.

My name’s Kimberley. I’m twenty-five. I have epilepsy, a seizure alert dog named Muffin, and a job I love as a senior housekeeper in one of London’s top hotels. I’m used to being invisible. Overlooked. Safe.

But that was before Jennifer Clifton checked in. She’s rich, powerful, terrifyingly calm — and she asked for me by name.

She gives me my dream job, working in her exclusive hotel in the Scottish Highlands. It’s more money than I ever imagined.

There’s just one Don’t open the door to Room 21.

How hard can that be?

But something is wrong in this hotel. The guests are unsettling. The staff whisper behind closed doors. And that room — the one I promised not to enter — calls to me.

I took the job for a better life. Now I’m trapped in a nightmare.