As Lucas finally decides to choose Peyton to be his girl, Leyton (Lucas and Peyton) fans will be excited. They become a happy couple, and are often teased about tying the knot. Things go well as the book Lucas wrote gets a movie offer, and Peyton’s pregnancy thrills the couple. However, problems occur when Lucas’ movie deal fails and Peyton get complications due to pregnancy.

To make things worse, Peyton’s ex-boyfriend arrives Tree Hill to produce the movie of Lucas. Meanwhile, Brooke is sabotaged in her store and is taken away to a dim location. Nanny Carrie seduces Nathan and becomes a threat to Nathan and Haley’s family. Haley influences Brooke to adopt a child named Sam. Nathan, Lucas and Skills become the coaches of the new Tree Hill Ravens. Nathan develops a strong mentor-student relationship with Quentin, who initially was the root of the problems in the basketball team and Haley’s headache in the classroom. Mouth and Millie’s relationship takes another level. Dan’s future seems to be bleak when a dog eats his donated heart.