The year is 1977, the place is Dublin, and the music is Thin Lizzy. Based on Ferdia MacAnna's novel of the same name, Last of the High Kings tells the story of Frankie, who is convinced he's going to fail his school exams and that all his dreams will be on the scrap heap. He's becoming increasingly obsessed with two girls, Jayne Wayne and Romy Casey, but the most powerful woman in his life is his mother, a Celtic Warrior Queen who tells her children they are descended from the High Kings of Ireland. To her, Protestants are enemies of the Irish state and the British are emissaries of the devil.
On his bedroom wall Frankie marks the days remaining until the dreaded arrival of his exam results when his life will end. In truth, Frankie is smart, gifted, courageous and very attractive to the opposite sex. Gradually he realises this and relaxes a little as he sees an exciting life ahead of him - and that's what this summer is all about!