Goodbye, Tree Hill High. Graduation nears and with its approach comes the realization that, for students and parents alike, life is changing forever. There are new loves to nurture, old scores still to settle. The longtime triangle of Lucas, Peyton and Brooke finally comes down to two. The memory of Keith--or is it his spirit?--inspires Lucas and Nathan and haunts Dan. Peyton is terrorized by a stalker. Two expectant mothers are about to raise Tree Hill's population stats. Lucas begins to wonder what really happened the terrifying day Keith died. And the Ravens--led by Coach Whitey Durham--have one last chance for hoops glory and the state championship.