A small disparate group of people are aboard a multi-day, multi-stop flight from Mexico City to Buenos Aires. Beyond the crew of pilot, Roberto Beltrán, a loner, his co-pilot Carlos Cervantes who is always looking for love, and Paco the flight steward, the passengers are: spoiled and rich Jorge Mancera and his innocent fiancée Margarita Téllez, who are posing as a businessman and his secretary but who are really running away to elope in Venezuela; elderly Marta Ortos and her henpecked husband, Professor Enrique Ortos, a botanist and anthropologist, the two who probably only have stayed married for as long as they have out of inertia; "Pibe", a young adolescent boy who is traveling with his male nanny, Pedro, ahead of the boy's professional polo playing father who will join them in Buenos Aires on a later flight; Lucy Alcázar, who most of the other passengers believe to be a trollop as a young woman traveling alone; and Sr. Ibáñez, a bounty hunter, who is transporting Sr.