The victim was his friend. So was the murderer.

Twenty-five years ago, troubled teenager Charlie Crabtree committed a shocking and unprovoked murder.

For Paul Adams, it's a day he'll never forget. He's never forgiven himself for his part in what happened to his friend and classmate. He's never gone back home.

But when his elderly mother has a fall, it's finally time to stop running.

It's not long before things start to go wrong. A copycat killer has struck, bringing back painful memories. Paul's mother insists there's something in the house. And someone is following him . . .

Which reminds him of the most unsettling thing about that awful day twenty-five years ago.

It wasn't just the murder.

It was the fact that afterwards, Charlie Crabtree was never seen again . . .