The Heights is a tall, slender apartment building among warehouses in London. Its roof terrace is so discreet, you wouldn't know it existed if you weren't standing at the window of the flat directly opposite. But you are. And that's when you see a man up there--a man you'd recognize anywhere. He may be older now, but it's definitely him. But that can't be because he's been dead for over two years. You know this for a fact.. Because you're the one who killed him.