Madrid, Spain, early 20th century. A woman turns up dead in a modest home. She turns out to be María la Jerezana, a popular singer who was famous years ago until she disappeared. The Police Commissioner in charge, dissatisfied with the official version, which concludes that the crime was the result of a simple robbery, is determined to find out the truth.

Science fiction comedy in which an overprotective mother causes an accident in the science lab where her son works that creates dire consequences in the space-time continuum.