Detour (1945) Tom Neal and Ann Savage.

Al Roberts, an unemployed piano player, hitches a ride, arriving at a roadside diner in Reno, Nevada. Another customer in the diner plays a song on the jukebox, that disturbs Al, for it reminds him of his former life in New York City. Al recalls a time there when he was bitter about squandering his musical talent playing in a cheap nightclub. After his girlfriend Sue Harvey, the nightclub’s lead singer, quits her job and leaves New York to seek fame in Hollywood, Al becomes depressed. After anguishing a while, Al decides to travel to California to marry Sue. With little money to his name, Al is forced to hitchhike across the country.