After spending three months doing experiments in space, scientists Antón and Daniel return to civilization. They're astounded to discover that the Earth has undergone an enormous cataclysm and the law of the gravity has even been altered in the interim.

Dos aspirantes a cantantes suplantan a otros cantantes muertos que en realidad eran agentes secretos de incógnito y que debían actuar en una reunión secreta que se celebra en un misterioso castillo.

1973 film by Antoni Ribas

Chris Miller, living with her stepmother in a large secluded mansion, finds her isolation interrupted by the arrival of an unknown scythe-wielding killer.

it is still worth seeing, for two reasons: Paul Strand's beautiful pictures and Silvestre Revueltas' beautiful score.