In the summer of 1977, in the coastal village of Howth, County Dublin, Ireland, on his last day of secondary school, a despondent Frankie believes he has failed his final exams. His plans to attend university and romance girls such as his classmates Romy and Jayne have been ruined. Nevertheless, he cheerfully goes out with friends that night.
The morning of June 30, Frankie anxiously begins waiting out the seven weeks until August 18, when his exam results are expected. Frankie's mother, Cathleen, berates him in front of his younger brother, Ray. When Frankie's theatrical father, Jack arrives, he impatiently drives his car through the locked property gate, damaging it before greeting his wife and five children. Jack gives Frankie a goldfish as a preemptive birthday present because he will soon leave again on an extended trip to the United States for another stage production, which will likely cause him to miss Frankie's next birthday. Before leaving, Jack gives Frankie some reassuring advice about his future.
Frankie plans a beach party and fantasizes being with Romy and Jayne on a local beach. Frankie receives a letter from Jack offering further advice, which only confuses him further. When his mother goes out for the night at a political function, Frankie invites a houseful of friends over, but the party fails to entertain because Frankie and his friends neglected to invite any women. One midsummer day, whilst Frankie and a friend attempt to repair the gate his father nearly destroyed, Romy visits to collect donations for the Labour Party. Frankie's mother later warns him to avoid Romy, Jayne, as well as all other Protestant women.