Nestor Castle-a bestselling, award-winning extreme horror author-has the perfect life, having transitioned from indie darling to mainstream success. Although he dislikes the limelight, he finds comfort cooped up in his lake house with his loving wife and healthy daughter. However, after announcing his next book-a departure from the horror genre-he finds himself targeted by a disgruntled fan who calls himself 'Butterfly.' Butterfly's messages...