Occasionally narrated by Humphrey Bogart, he regales us with his story as the down on his luck Hollywood writer/director "Dawes" who alights on a tavern dancer in Madrid. "Maria Vargas" (Ava Gardner) is a woman with striking good looks and an aloofness that he immediately sees stardom in. Luckily his spoilt rich-kid backer "Edwards" (Warren Stevens) agrees to give her a screen test, but a combination of his own fecklessness and some competitive manoeuvring from "Dawes" creates quite an interest, an interest well fanned by PR man "Muldoon" (Edmond O'Brien). We know right from the start that…