At a high-school party, four friends find that losing their collective virginity isn't as easy as they had thought. But they still believe that they need to do so before college. To motivate themselves, they enter a pact to all "score." by their senior prom.
Forks, Washington resident Bella Swan is reeling from the departure of her vampire love, Edward Cullen, and finds comfort in her friendship with Jacob Black, a werewolf. But before she knows it, she's thrust into a centuries-old conflict, and her desire to be with Edward at any cost leads her to take greater and greater risks.