Bella and Edward are married, Bella discovers she is pregnant during their honeymoon. Her pregnancy progresses rapidly, she nearly dies giving birth to Renesmee, a half-vampire-half-human daughter. To save her, Edward injects Bella with his venom. Now Bella becomes a vampire. However, a vampire mistakes Renesmee as an "immortal child" which existance violates vampire rules. The Cullens try to convice Volturi that Renesmee poss no danger to vampires secret.