Mary is pregnant with twins, but, in childbirth, one of the babies dies. Diagnosed with postpartum depression, the woman enters a spiral of neurosis, especially when she discovers the stories about a demonic being that feeds on mothers and newborns.
Mary, a new mother, gives birth to twins, but only one of them is alive. While taking care of her living child, Adam, she suspects that something, a supernatural entity, has chosen him and will stop at nothing to take him from her.