Senior year. A time to grow up, to forget, to forgive, to dream, to learn to love all over again. People come together -- except Dan, consumed by anger as he tracks down whoever started the fire that almost took his life. Tree Hill is rocked by powerful new events -- the good, the bad and the catastrophic. The good: Haley fights to save her marriage, Peyton comes to terms with her birth mother, Brooke creates a hot clothing line, and Keith comes home. The bad: Dan gets a rival for worst person in Tree Hill -- a conniving redhead named Rachel, the new girl at school. The catastrophic: Tragedy strikes Tree Hill High, and suddenly who wins the cheerleading tournament or basketball championship seems insignificant compared to who lives. And who doesn't.