A man in his mid-50s is mourning his wife's death. People often gossiped about the age difference between them - she was 15 years older - but Edward Carr didn't care, because "she was worth loving". He won her from her first husband after a fistfight, and they built a profitable business, which he calls his "kingdom", recovering and renting classic cars (the ostensible reason for the title). The sex was always mighty: he never tired of "being inside her". Yes, LaBute's taboo du jour is incest, and the play is a loose adaptation of Sophocles' Oedipus Rex.