Someone pushed my boyfriend under a train. Everyone thinks it was me.

The police say he took his own life. But there were four other people at the tube station that day – and I know one of them killed him.

So I flee to Tidesong, my family’s crumbling clifftop house in Cornwall. Here I can grieve Marcus. Come to terms with his betrayal. And work out what really happened.

I think I’m safe here. Then the message flashes onto my laptop: Marcus didn’t jump. He was pushed. I know it was you.

Someone’s watching me. Someone has followed me here. Someone knows my secrets – or thinks they do.

And they won’t stop until I pay for what they think I’ve done.