The Crooked Web (1955)

Following WWII exGI Stan opened up a drivein restaurant His girlfriend Joanie is one of the car hops They want to get married someday but the lessthanstellar business the restaurant takes in puts a hold on that plan One day Joanies neerdowell brother Frank blows into town with a moneymaking scheme Shes against it but Stan an inveterate gambler finds the promise of riches too seductive to resist