In 1970s suburbia, Maggie, who has just lost her virginity that day and her younger siblings, Christian, Janie and Sam 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, clearly a heavy drinker and a lawyer father Martin, affectionate but distracted. Still, everything seems normal. It isn't until the arrival of another couple, Clark and Nadia for a night of cards and drinks that things begin to unravel.