When little Julie goes missing in summer 1986, David and Samuel share the terrible secret of her disappearance. Thirty years later, David has become a famous author and Samuel his publisher. Both receive identical manuscript chapters telling the story of what really happened that tragic summer.

Chapter after chapter, the author reveals their darkest secrets. They know the book will end with its 12th chapter. A race against time begins: will David and Samuel expose the mysterious author's identity before he exposes them? And did one of them kill Julie?