Man in the Vault (1956)

There's $200,000 in a Los Angeles safety-deposit box that mobster Willis Trent would like to have, so he gets two-timing, double-dealing Flo Randall to get the box number for him. He offers locksmith Tommy Dancer $5,000 to make the key but Tommy refuses. Trent threatens to harm Tommy's girl friend, Betty Turner, and Tommy gives in and goes to the bank. In a few nerve-racking minutes, Tommy makes the key and pockets the $200,000 for himself. Trent sends word that he has kidnapped Betty and the ransom is $200,000.