In the fourth part, Bella Swan is faced with a difficult choice — to save the life of herself or her child (half vampire, half human). She decides to keep the baby, but Edward and the rest of the Cullen family are categorically against it.

There is no one to wait for Bella's help, but she comes unexpectedly, from someone from whom she was not expected at all. Together, Bella and Rosalie are trying to save the baby's life, not even realizing what terrible consequences this will lead to.