The Tree Hill residents are forced to face their fears as Dan turns over on a new leaf and Brooke taking the hardest decision of her life. In the meantime, Haley's career takes a turn and Peyton is visited by somebody from her past. Mouth and Millicent meet a new face. With all, Lucas and Brooke help each other through the struggles.
Lucas is crushed by devastating news. Quentin is pushed to his limits during a Ravens game. Dan's is second on the donor recipient list to get a new heart. Haley thinks about her decision to release a new album while Brooke's baby undergoes emergency surgery and a shocking truth stuns Peyton, told by Lucas.
Nathan and Haley throw a birthday party for Jamie. Deb hired a clown, and Haley is not happy with it since it's a creepy one. Lindsey returns to Tree Hill for Jamie's birthday, which gives Lucas hope that the relationship will be rekindled. When Dan arrives, Deb's mood swings fast and in the meantime Brooke and Peyton attend the party with baby Angie.
Nathan and Haley have learned from the mistakes with the nanny, so they decide to interview potential nannies or mannies, but it goes in a completely different way. Meanwhile Brooke still wants to go ahead with adopting a baby. Mouth and Millicent take a new step in their relationship and Quentin must reconsider his intentions.
Lucas picks up the pieces after being left at the altar by Lindsey, while Nathan and Haley deal with the repercussions of Jamie's abduction. Dan is free for now, but he must find himself a job to convince the parole that he is changed for good. Brooke is haunted by her past as a woman from adopting asks her questions, while Peyton gets a visit from an old friend.
It's confrontation time in Tree Hill, as Lucas confronts Peyton about her nasty behavior towards Lindsey and Brooke must confront Victoria about meddling with Peyton's record label. Meanwhile, Nathan begins to grow closer to Carrie, Haley continues to struggle in dealing with Quentin, and Mouth must choose sides between his co-workers and Alice.
Now that Peyton and Brooke are back in Tree Hill, Lindsey worries that the two might threaten her and Lucas' relationship. Meanwhile, Nathan visits Dan in prison (his first visit in four years) and gives him a picture of his grandson. Meanwhile, Haley tries to persuade Quentin to return to school, Brooke opens her store in the old Karen's Cafe and Peyton signs her first band.
It's four years into the future and the Tree Hill gang has finished college. Now, their lives have taken completely different directions. Lucas has written and published a book, Brooke has made it big in the fashion industry with her brand "Clothes Over Bro's", Peyton is pursuing a career in the music business, and Nathan and Haley continue to raise a now older James.