What a difference a school year makes. At first, half-brothers Nathan and Lucas Scott were bitter rivals on and off the basketball court. Now they bond as brothers. But there's drama, trauma, devotion, betrayal, twists and turns to come. To protect those he loves, Lucas moves in with Dan. Brooke and Peyton mend their friendship - and beginia year of romantic turmoil for both. Nathan and Haley's marriage frays. Newcomers to Tree Hill High push emotions into high gear. And in the background is vindictive Dan Scott, controlling others like an evil puppet master. But there are some things even he can't control.