![The Shadow Effect](https://image.tmdb.org/t/p/w185/in6p8c9ceTs1wDDkaVwXBXIsjQi.jpg)
A space shuttle mission investigating Halley’s Comet brings back a malevolent race of space vampires who transform most of London’s population into zombies. The only survivor of the expedition and British authorities attempt to capture a mysterious but beautiful alien woman who appears responsible.