Cosette and Marius get engaged which means that they are about to get married! Before their wedding, Valjean tells Marius that he is going to go away forever after the wedding because he thinks that he is a bad person. At the wedding, Marius learns that Valjean saved him, so he and Cosette tell Valjean that they don't want him to go away. But Valjean is too sad so he still dies. As he dies though, he sees Fantine again.