Nobody Will Know (1953)

Pedro Gutiérrez is a modest bank employee who is in financial difficulties and dreams of marrying María. One night, while he is at the office working overtime, Pedro discovers some thieves. After shooting him in the leg, the thieves flee in terror, leaving a bundle of thirty thousand dollars inside the safe. Puzzled, Pedro decides to appropriate the money with the intention of leading a more comfortable life, which will cause him many problems.