After the summer fireworks caused by a dangerous confrontation with Lilly Kane's murderer and a surprising visitor at her door, Veronica attempts to settle into "normal" life, complete with a new after-school job and a return to the popular fold at Neptune High, but she gets pulled back into the investigation business when Wallace is kicked off the basketball team for testing positive for drugs.Meanwhile, Keith sits down with reporter Julie Chen to discuss his new book on the Lilly Kane murder, "Big Murder, Small Town." Later, after seeing his father arrested for murder and being charged and tried for murder himself, Logan seeks refuge from the paparazzi and relaxes poolside at the Casablancas mansion with buddies Dick and "Beaver" and their sexy stepmother Kendall.

After tragedy strikes Neptune, Calif. and the local sheriff rushes to judgment, an emotional Veronica attempts to help a grieving family member rule out suicide as a contributing cause in the calamity. Meanwhile, Wallace offers to help transfer student Jackie Cook, the fiery, flirty daughter of professional baseball player Terrence Cook, track down the person who damaged her car in the school lot. Later, mayoral candidate Woody Goodman asks Keith to consider running for sheriff.

Beaver hires Veronica to investigate his stepmother, Kendall, who he believes is cheating on his dad and planning to clean him out, but both are shocked by what they discover. Meanwhile, Wallace begins dating Jackie, against Veronica's advice.

While dealing with her own feelings of jealousy regarding Duncan, Veronica helps a young woman who believes that her new fiancée is secretly after her fortune by sifting through his background and even posing as a sexy, available coed to entrap the guy.

Deciding to give Jackie the benefit of the doubt since she's dating Wallace, Veronica tries to help Jackie determine who stole her credit card, leading Veronica to appear on a psychic's community access show to pursue a lead. Meanwhile, Wallace confronts his mother Alicia about who his real father is. Later, Veronica learns of a voice mail recording from one of the students that died, made at the moment the bus crash.

With Aaron Echolls facing trial for Lilly's murder, the previously accused Abel Koontz appears to enlist Veronica's help in finding his missing daughter Amelia, leading to a confrontation with Kane Software's head of security. Meanwhile, Logan is arrested

Veronica and Duncan discover that the still-comatose Meg had been babysitting an abused child, leading Veronica to take on an unfamiliar role as a babysitter to determine the kid's identity. Meanwhile, Kendall continues her affair with Logan as her stepso

Veronica helps Keith determine who is haunting a school bus crash victim's parents, currently embroiled in a suit against the school district for negligence.Meanwhile, after Logan asks for help fighting the murder charge against him, Veronica stumbles

After Veronica gets busted for breaking into the school office and ordered in detention to reorganize the school's files, she stumbles on her mother's permanent record and learns that she was suspended for reasons that cause Veronica to further question e

When Duncan disappears with Meg's baby, Lamb must work with two FBI agents to extract as much information as possible from an uncooperative Veronica. Meanwhile, Wallace reveals the real reason he returned to Neptune, and Weevil and Logan make a breakthrough in their hunt for the rogue gang member.

Wallace's hopes of escaping his trouble in Chicago are dashed when Rashard's uncle accuses him in the press of a hit and run. Meanwhile, Weevil has Veronica bug a church confessional to smoke out the traitor in his bike gang.

When the profits from the Neptune High Winter Carnival go missing, Veronica finds herself defending Jackie from the condemning teachers and students. Meanwhile, Keith meets with her father, Terrence Cook, after he is accused of playing a role in the bus crash, and Logan initiates a new relationship while Beaver continues an old one.

When a private website for Neptune High's gay students is hacked, and the members blackmailed, Veronica finds it difficult to track down the culprit when the victims want to remain anonymous. Meanwhile, Hannah finds out Logan's true intentions, and Keith believes he has found an alibi for Terrence.

Wallace's new girlfriend Jane enlists Veronica's help when her older sister Heidi appears to be a "runaway bride," but the clues suggest something possibly more disturbing happened on the way to the altar. Meanwhile, Keith and Veronica decide that they have no choice but to go to Sheriff Lamb with the evidence they've uncovered about the bus crash. Later, Kendall has a tempting offer for Aaron Echolls.

While accompanying Wallace to Hearst College, she runs into her ex, Troy Vandergraff, who enlists her help when he is accused of date rape. Meanwhile, Keith helps Cliff with a personal problem involving a prostitute, and Logan makes a decision regarding his relationship with Hannah.

Overcome with guilt and frustration, Weevil asks Veronica for help to bring Felix's true killer to justice, but realizes he may have to take matters into his own hands.Meanwhile, Keith reviews a strange DVD that Woody receives in the mail, and relationship troubles brew between Wallace and Jane, and Mac and Cassidy.

Veronica begins having dreams involving the dead students from the bus crash, who drop clues along the way. Meanwhile, Logan and Wallace become unlikely lab partners in Mr. Wu's class, and Keith helps Clemmons expose a doctor's scam.

What promises to be a simple case of finding out who ran over a classmate's dog turns into a startling revelation when new secrets about the bus crash come pouring out and Veronica finds herself again revisiting Lilly's murder case. Meanwhile, Wallace and Jackie try to turn their relationship around the corner, and the PCHers turn to Weevil for protection from the Fitzpatricks.

Gia enlists Veronica's help to find out who is stalking her, and Clemmons cancels the senior prom.

Veronica takes the stand in Aaron Echolls's murder trial, and is distracted during final exams while waiting for the verdict. Meanwhile, Keith takes new evidence about the mayor to Lamb, and Weevil asks Mac and Cassidy for help to pass algebra.

After discovering the true perpetrator of the bus crash, Veronica is desperate to warn others before it's too late. However, she inadvertently puts herself and her loved ones at risk in the process. Meanwhile, Keith tracks down Woody in hiding, Wallace leaves for Paris to be with Jackie, and Weevil again runs into trouble with the law.