The movie begins with Bella and Edward getting married and starting their new life together. However, their happiness is short-lived, as Bella soon becomes pregnant with a half-human, half-vampire child. The pregnancy accelerates at an alarming rate, putting Bella's health at risk. The Cullens gather their allies to protect Bella and the unborn child from the Volturi, a powerful vampire coven that believes the child is an "immortal child," which is against the law of the vampire world.