Its a story about a 17 years-old girl named Isabella Swan (who prefers to be called Bella) moving to Forks, Washington to live with her father, Charlie.At her new school, she attracts much attention, several boys want to get to know her.

On the first day of school, on the biology class, Bella is seated next to this one guy, Edward, he's somehow repulsive, right after the class is ended, he goes to the administration begging to change class, and the next day he disappears. Several days afterwards, he pops out in the class, apologizing of being so rude to Bella. They become friends in short of time, until one day when Bella nearly crushed by Tyler's van and Edward comes to rescue her. The way Edward saves Bella by stopping the van only using his bare hand, it startles Bella.

Later, Bella starts to get obsessed with how Edward saves her life, she goes to town to find books, and find information about Edward and later believes that Edward and his family are vampires and their diet are blood. Moreover, after hearing story from Jacob about the local legend, she comes to the belief that Edward and his family are indeed vampires who only consume animal blood. Till one day, once again Edward saves Bella in Port Angeles when she is almost attacked. And Edward takes Bella to dinner afterwards, on the way back, Bella told him about her vampire theory and get Edward to admit that he is a vampire. Eventually Edward explains the whole thing. From then on, most of the time they spend their time together, and both fall in love.

Their relationship is affected when a nomadic vampire coven arrives in Forks. James, a tracker vampire who is intrigued by the Cullens' relationship with a human, wants to hunt Bella for sport. The Cullens attempt to distract James by separating Bella and Edward, and send Bella to hide in a hotel in Phoenix. There, Bella receives a phone call from James, who claims to be holding her mother as a captive (which she later realizes was a trick). When Bella surrenders herself, James attacks her. When James was just about to kill her, Edward, along with the other Cullens, rescues her and destroy James, unfortunately James bites Bella's hand and snaps her leg. Edward successfully sucks the poison out from her bloodstream and prevents her from becoming a vampire, then she is taken to a hospital. Upon returning to Forks, Bella and Edward attend their school prom, and Bella expresses her desire to become a vampire, but Edward refuses.