Passengers on a ship traveling from Mexico to Europe in the 1930s represent society at large in that era. The crew is German, including the ship's Dr. Schumann, who falls in love with one of the passengers, La Condesa. A young American woman, Jenny, is traveling with the man she loves, David. Jenny is fascinated and puzzled by just who some of the other passengers are.
Dr. John Carpenter takes the job of running a health center in a low-income district. He enlists three women to help out who — unbeknownst to him — are actually nuns in street clothes. The church wants to improve the neighborhood but fears that nuns in full habit would not be well received. Unaware of her unavailability, John falls for Sister Michelle, serenading her with his guitar — which, luckily for him, effectively wears away at her religious resolve.
Returning home from a business trip, an architect assumes that a client is having an affair with his wife and murders the man. His feelings of guilt and attempts to conceal the crime lead to more complications and death.
