Emma Carpenter lives in isolation with her golden retriever Laika, house-sitting an old beachfront home on the rainy Washington coast. Her only human contact is her enigmatic old neighbor, Deek, and (via text) the house{u2019}s owner, Jules. One day, she reads a poorly written{u2014}but gruesome{u2014}horror novel by the author H. G. Kane, and posts a one-star review that drags her into an online argument with none other than the author himself. Soon...