Bella nearly dies giving birth but Edward successfully delivers their baby girl and then injects his venom into Bella's heart, thus healing her wounds by turning her into a vampire. During Bella's painful transformation, Jacob imprints—an involuntary process in which a shape-shifter finds his soul mate—on the baby, Renesmee Cullen.
After a vampire named Irina mistakes Renesmee for an immortal vampire child (a creation that is forbidden in the vampire world), Alice foresees the Volturi will arrive to destroy the Cullens as punishment for the alleged transgression. The Cullens find an array of vampire witnesses to observe the mortality of Renesmee. Bella soon discovers her ability to shield people from their mental thoughts and senses.