On her 18th birthday, Bella Swan wakes up from a dream in which she sees herself as an old woman. She expresses her distaste with growing older than her boyfriend Edward Cullen, a vampire who physically stopped aging at 17. Despite her lack of enthusiasm, Edward's adoptive family throws Bella a birthday party. While unwrapping a gift, Bella gets a paper cut, causing Edward's brother, Jasper, to become overwhelmed by her blood's scent and attempt to kill her. Realizing that he and his family pose a danger to Bella, Edward ends their relationship, and the Cullens leave Forks, Washington permanently.Edward's departure leaves Bella heartbroken and depressed for months. However, when her father, Charlie, wants her to live with her mother in Florida, Bella agrees to spend time with her friends. After a movie with Jessica, Bella sees a group of men on motorcycles. This reminds her of when Edward previously rescued her from an assault, and she sees his image warning her to stay away. Bella discovers that thrill-seeking activities evoke Edward's preserved image. She is also comforted by her deepening friendship with Jacob Black, a cheerful companion who eases her pain over losing Edward. When Jacob is unable to see Bella for weeks, she discovers that he is a werewolf, an age-old enemy of vampires. Jacob's pack members are on constant patrol for Victoria, a vampire searching to kill Bella due to the death of her mate, leaving Jacob little time to spend with her. Alone again, Bella returns to seeking thrill-inducing activities.
Through a series of miscommunications, Edward believes Bella has killed herself. Distraught over her supposed suicide, Edward flees to Italy to provoke the Volturi, a powerful vampire coven capable of killing him, by exposing himself in the sunlight. Alice, Edward's sister, and Bella rush to Italy to save Edward, and arrive just in time to stop him. However, the Volturi determine that Bella, a human who knows that vampires exist, must either be killed or transformed into a vampire herself. Alice stops them from killing her by sharing her premonition with Aro, a Volturi elder who is able to read thoughts, in which Bella has been transformed. Returning to Forks, Edward tells Bella that he always loved her and only left to protect her. She forgives him, and the Cullens vote in favor of Bella being transformed into a vampire, to Edward and Jacob's dismay. Edward gives Bella a choice: either she lets Alice change her after their graduation, or, if Bella agrees to marry him, he will change her himself. However, Jacob reminds Edward of the treaty the Cullens made with the Quileutes: they will not attack each other, as long as the Cullens never bite a human.
Source : Wikipedia
