Juan Fonseca works as managerial from a modern factory, where they start using a new machine that revolutionizes all known techniques. After 7 years of courtship he gets married and enter in the consumer society: car, house, TV... His wife is pregnant and the money he earns it is not wnough so he is forcer to have more tha one job. Stress will bring dangerous consecuences to his health

Los doce hombres de un jurado tienen que dictar sentencia en un caso de homicidio en el que un muchacho es acusado de haber asesinado a su padre. Si los doce jurados le consideran culpable, la sentencia irrevocable será la pena de muerte. Para que lo declaren inocente, también tiene que haber unanimidad.