Life is good for Will and Rosalind. They're happily married, with a beautiful family and a new house.
Things take a turn shortly after Rosalind delivers their new baby, a boy named Amedeo. Rosalind seems to think that she had twins, and can't be swayed from this idea. Her mental health rapidly deteriorates.
Will returns from a business trip to discover his wife, step-daughters, and son missing. He tracks them down and makes a grisly discovery. While there are still clues to uncover, one thing is sure - things will never be the same again.