Christian is a writer, that's all he has ever wanted to be, and all he knows. Without it, he feels worthless. When Christian sits down to write the finale to his masterpiece, he starts to have doubts over killing off his leading lady and greatest creation, Regan. But when Regan starts speaking to him, she helps him finish the story and let go - realising he attached more to her meaning than he first imagined.
Like a puppet master the writer controls his characters... but who's really in control?