The Tree Hill gang deals with the aftermath of the limo accident. Dan offers his help to Karen, and Lucas strengthens his friendship with Peyton, who gets some surprising news; Brooke does as well, and she makes a new friend from an old rival.

 

Brooke reluctantly celebrates her 18th birthday with Rachel; Nathan continues to struggle with his part in the limo accident; an unstable Deb brings a gun to the cafe; and Dan reaches out to Karen as his guilt over Keith's death continues to haunt him.

 

 

 

Word gets out about Brooke's delicate condition; Deb's addiction worsens, forcing a confrontation; Karen and Dan grow closer, as do Rachel and Nathan when they share a secret about the accident.

 

Nathan gets two surprises in a row, and everyone is eager to share their advice with him; Deb also shares something she picked up; and Brooke decides to celebrate. Peyton's stalker (her brother) attacks her and her real brother saves her along with Lucas.

 

Nathan struggles with money problems and reluctantly asks Dan for help; Brooke learns the new man in her life is also her new English teacher; Peyton gets help from an unexpected source; and Lucas returns to the Ravens just in time to help the team advance in the playoffs for the state championship.

 

Peyton returns to school, but she breaks down; Brooke's fashions are a hit at the local show; Nathan is cornered into a no-win situation by Duante; Deb takes drastic action for her addiction.

 

After a cardiac incident, Lucas has a dream in which the spirit of Keith visits and shows him how much one life can affect the lives of others, with a nod to “It's a Wonderful Life.” Elsewhere, Haley is the victim of an accident and Dan helps out Nathan.

 

The aftermath of the series of unfortunate events in Tree Hill begins. Lucas returns to his everyday life, following his heart attack, and tries to rekindle his relationship with Peyton. However, things are rougher for Haley when she discovers that Nathan had more involvement in her accident than she could have ever imagined.

 

Haley finds herself frustrated over her injuries while Skills and Mouth help Nathan find a job as a stripper in order to earn money for the senior prom. Meanwhile, Brooke betrays Rachel in order to get with a new guy and Lucas and Peyton finally reach happinness in their relationship.

 

A class assignment reveals the deepest secrets and desires of Lucas and the students at Tree Hill High. Worried about college prospects, Skills turns to Haley, while Nathan wrestles with Deb's suicide attempt. Chase learns that Brooke cheated on her calculus exam, while nudity and drugs run rampant in the halls of the school.

 

Haley confronts Brooke regarding the stolen calculus test. Lucas and Peyton consider taking their relationship to the next level as Peyton and Brooke grow closer. In Deb's absence, Nathan throws a senior party at the Scott House where a sex tape from Nathan's past surfaces.

It's Prom day, and emotions are flying high at Tree Hill. An emotional Haley confronts Nathan about the sex tape and asks for a list of all his past sexual encounters. Meanwhile, an angry Peyton asks Lucas to skip the dance altogether, but he refuses to take no for an answer. Finally, Brooke and Peyton let out all their tension in a confrontation that can tear them apart forever.

It's Prom night, but things start to go awry as Lucas discovers who was the person in the hallway when Keith was killed, and psycho Derek holds Peyton hostage at her own house. Meanwhile, Haley and Nathan vow to be romantic with each other throughout the night and Dan continues to win over Karen's affections.

When Mouth and Rachel's road trip goes wrong, the other teens go out to their rescue. While on the trip, Nathan and Haley get a second chance to enjoy their Prom and Peyton and Lucas decide to take their relationship to the next level. Finally, Brooke reveals the truth about the stolen calculus exam to Haley.