A childhood operation reveals a shocking secret: Thad Beaumont had a twin brother who never developed. As a successful author, Thad writes serious books under his own name and pulp fiction under the pseudonym George Stark. When blackmailed, Thad fakes George Stark's death, but soon becomes the prime suspect in a series of brutal murders.

The Dark Half
A writer's fictional creation comes to life, seeking to supplant its creator in the real world.