Her father investigates further and finds that the lord of the village is the leader of a black cult who is raising the dead to be his slave labor in a closed down mine. I've probably given you more story details than you need to know. If you know anything about Hammer films you know what to expect. Although I must say The Plague of the Zombies stands with the best of what Hammer ever produced. It's truly amazing how well this film has held up.
Blacks are dark and rich.
There is very little color bleed. Sound is in Dolby Digital Mono and it serves its purpose. Dialogue is clear and there is almost zero hiss or distortion. Languages are in English and French. There are no subtitles for the hearing impaired, a situation that Hammer has said they are in the process of changing for future releases.