All aboard for the most gripping mystery of the year. Eight passengers board the train. Will any of them survive the journey?

When ex-detective Midge McGowan embarks on a sleeper train to Scotland, she's hoping for a nice relaxing trip to enjoy the snowy highlands. Instead, the journey quickly turns into a nightmare.

There's a priceless piece of art on board that's rumoured to be cursed. One of the passengers is a mysterious prisoner on release from jail, who won't speak to anyone and remains locked in his cabin, with a guard posted on the door. And then the lights go out, the train stops, and someone turns up dead.

Their body is found inside a locked carriage - with no way in or out - so how was the crime committed? Is this really the work of a ghost? Or has one of the guests just pulled off the perfect murder? The only thing Midge knows for sure is that not all of them will reach their destination alive...