In 1970's suburbia, Maggie (Olivia Harris), who has just lost her virginity that day and her younger siblings, Christian (Jonathon McClendon), Janie (Alexandra Doke) and Sam (Ian Veteto) spend the night telling each other stories in the attic. When their parents return home, it soon becomes apparent that the family dynamics are frayed, with the housewife mother Donna (Molly Parker), clearly a heavy drinker and a lawyer father Martin (John Hawkes), affectionate but distracted. Still, everything seems normal. It isn't until the arrival of another couple, Clark (Jonathan Freeman) and Nadia (Lydia Mackay) for a night of cards and drinks that things begin to unravel.