The plot of this novel is very much a continuation of the last book. Edward and Bella are still in love. Bella wants to become a vampire, but she also gets more nervous about it as the time to change comes closer. Bella is still caught in what is an apparently classic love triangle between human, vampire, and werewolf. And Bella is still in danger: Victoria is still trying to avenge her lover's death by killing Bella, and the ruling vampires in Italy are still intent on Bella becoming a vampire.
I have a guess of where this last novel is going, but I might be completely wrong. I feel like all three books have been building up to something with nothing ever really changing, so I am going to be disappointed if Meyer doesn't come up with some kind of satisfying conclusion.