On the night of her wedding to Edward Cullen, Bella Swan is visited by her friend Jacob Black. When Bella accidentally indicates to him that she and Edward plan to consummate during their honeymoon, Jacob tries to attack Edward but members of his wolf pack hold him back. He then runs off into the woods, and Edward takes an upset Bella back to the reception.
The couple spends their honeymoon on a private island in Brazil called Isle Esme. Although hesitant, Edward has sex with Bella for the first time. After Edward realizes that he bruised Bella’s arm during sex, he says that he will never have sex with her again, much to her disappointment. After many attempts to make him have intercourse with her, Edward finally gives in. Two weeks into their honeymoon, Bella discovers that she is pregnant with a half-human/half-vampire child at an unnaturally accelerated rate. They rush back to Forks, Washington, where Carlisle confirms the pregnancy. However, Bella refuses to heed Carlisle and Edward’s advice for an abortion, and enlists Rosalie to protect her and her unborn baby.
Opposed to Sam Uley’s plans to kill Bella and her child, Jacob leaves the pack in protest and arrives at the Cullen house to protect Bella along with Seth and Leah Clearwater. As the pregnancy progresses, Bella’s health greatly deteriorates, and Edward gives her blood as a last resort. Her health greatly improves as a result, but that night, Bella goes into a very painful labor and gives birth to her daughter, Renesmee. To save her life, Edward injects Bella’s heart with his venom, but nothing happens, and Bella is thought to be dead. Greatly distraught, Jacob attempts to kill the baby, but stops when he realizes he has imprinted on her.
When the werewolves learn of Bella’s death, they attack the Cullen house to try to kill the baby. They stop when they learn of Jacob’s imprinting of Renesmee, which under werewolf law, now means Renesmee cannot be harmed. Later that night, Bella’s wounds heal and she wakes up with red eyes. Meaning that she is now a new-born vampire.
An additional scene shown after the main cast names are displays shows a woman, obviously a human, walking towards the Volturi leaders as they sit in thier thrones, and gives Aro a letter. The letter is from Carlisle stating that he has added a new member to his coven. He notes that she spelled Carlisle with an ‘s’ as if she has done something wrong, and he motions for Felix and Demetri to take the receptionist away. Marcus dully states “This means our dispute with the Cullen’s is over.” To which Aro replies that it is not over, that it goes far beyond the fate of a mere human and that the Cullen’s have something he wants. The scene ends with Aro smiling while both Caius and Marcus look on astonished as the screen fades to black.