The Devil's Hairpin is a 1957 American sports drama film written and directed by Cornel Wilde who also stars alongside Jean Wallace and Mary Astor.
He is continually goaded by Mike Houston, a sportswriter, to come out of retirement and challenge the top racer of the day, Tony Botari, particularly after egotistically saying in an interview that Botari has no real competition now that he's out of the sport.
Nick's girlfriend is Kelly James, a health club instructor.
He declines, so she goes back to former boyfriend Danny Rhinegold, who now runs Botari's racing team.
A self-sacrificing gesture is rare for him, so after the race, Kelly accepts when Nick finally proposes to her.