Can you keep a secret?

"It's been twenty years since Lindsey has seen her best friend Rachel. Twenty years since she has set foot in Thornbury Hall - the now crumbling home of the Bagenal family - where they spent so much time as teenagers. Since Patrick Bagenal's eighteenth birthday party, the night everything changed. Patrick has decided on one last hurrah before closing the doors of his family home for good. All of the old crowd, back together for a weekend. It's no...