A devout gear-head finds his life thrown into a tailspin after losing his beloved 1970 Plymouth Barracuda and suffering a head injury that alters his entire personality. Upon completing his sentence in home detention, Bo Durant (Gabriel Macht) loads up on liquor and fires up his engine. But when the cops catch Bo and throw his car in impound, the booze-fueled joyride comes to a sudden end. When all attempts to get back his beloved Barracuda fail, Bo bites the bullet and starts riding his car to work. Then one day, while peddling home, Bo gets struck by a speeding car and suffers some bizarre side effects from his injuries. Subsequently unable to relate to his wife Jenny (Kim Dickens) or communicate with his best friends Raina (Kate Walsh) and Glen (Brad William Hanke), the homebound car lover finds that the only person who can understand him is his stepdaughter Dale (Alison Pill), who suspects that his injury has transformed him in ways no one can yet understand. When Dale attempts to protect Bo by shutting him off from the rest of the world, her rash actions threaten dire consequences.
