Newlywed couple move from small town to Mexico City. Their first night in the city, they get separated by accident, and it takes them 90 minutes and lots of incidents before they find each other again.
Trumpet-player in a club band falls for a streety young woman; she dumps him to become a kept woman... and his roommate the pianist is dealing weed... and...
The characters are refugees from the war who have arrived in America. Ricardo Moller is a scientist who the war has left sexually mutilated, while Arturo Gonzálvez is a professor who believes that another passenger is insane, unaware that she is his wife accompanied by their children.
Dolores, an innocent country girl, arrives as a maid to a rich house, where she meets a street vendor with whom she falls in love, until the dangers of the city catch up with her.