Despite his overwhelming fear of interacting with people, Christopher, a mathematically-gifted, autistic fifteen-year-old boy, decides to investigate the murder of a neighbor's dog and uncovers secret information about his mother.
Richard, a wealthy doctor, invites his estranged sister Angela and her family to join his for a week at a vacation home in the English countryside, which results in a symphony of long-held grudges, fading dreams, and rising hopes.