La honradez de la cerradura (1950)
Ernesto and Marta are a couple of newlyweds who have serious financial problems. One day they are visited by a neighbor asking them to keep a large sum of money at home until she goes to the bank the next day. But everything changes when, the next morning, they learn that the neighbor is dead and that the deceased's maid has been arrested suspected of having stolen the money. Ernesto and Marta then start to spend the money until a man appears who threatens to tell their secret if they do not give him a part of the money.