Three teenagers' lives are changed forever when they thoughtlessly steal a stop sign from a dangerous intersection and a young mother is killed in an automobile accident there.
When Catalina "Cat" Duran and her friends in the History Club arrive at Mount Rushmore on a school trip they find that someone is playing dangerous tricks and trying to drive people away from the park.
As The Avenger searches for the teenage boys who trashed a house in his neighborhood, Buddy, one of the trashers, increases his drinking in order to cope with his parents' separation and his obsession with the daughter of the owner of the vandalized house.
Bones, a former police officer, once again teams up with Verity, a clever twelve-year-old with Asperger's syndrome, who helps clear Bones of vandalism charges.