Police are alerted to a series of murders all surrounding an old cabaret.

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

1971 film

1971 film directed by Fernando Merino

La I.I.S.S. (International Investigation Spanish Section) es una agencia clandestina de detectives, especializada en "infidelidades matrimoniales". Julio, el creador de la agencia, utiliza las técnicas más avanzadas. Su ayudante Timoteo se dedica a la investigación en el tiempo libre que le deja su profesión de bombero y, por supuesto, robándole horas al sueño, por lo que se suele quedar dormido en los momentos más inoportunos.