After learning the identity of the perpetrator responsible for the bus crash, Veronica hurries to warn others, but ends up putting herself in an extremely perilous situation.
Meanwhile, Keith enlists Veronica's help in his ongoing investigation of Woody and asks her go undercover to get some vital information from Woody's lawyer. Later, when graduation day finally comes around, Neptune seniors celebrate at a huge party at the Neptune Grand.
Veronica Mars is set in the wealthy, seaside community of Neptune, where the rich and powerful make the rules, own the town and the high school and desperately try to keep their dirty little secrets just that secret. Unfortunately for them, there's Veronica Mars, a smart, fearless 18-year-old apprentice private investigator, who negotiates the halls of Neptune High each day like any average teenage girl, while at night helps her private-eye father uncover some of the California beach town's toughest mysteries.