In this 1974 horror film directed by Jorge Grau, the story unfolds in the English countryside where a series of mysterious deaths occur, seemingly linked to a new agricultural machine that uses ultrasonic radiation to kill insects. The plot follows two travelers, George and Edna, who become entangled in the investigation as the dead begin to rise, leading to a chilling confrontation with the undead. The film stars Ray Lovelock and Cristina Galbó, whose performances add depth to this atmospheric tale. Notably, the movie is recognized for its unique blend of horror and social commentary, making it a standout in the zombie genre. For those interested, it can be viewed for free on 123Movies / Movies123.