Some sort of anomaly has landed in Wisconsin, some form of alien life form has arrived and it has a lot of legs and a lot of eyes! Tarantula sized spiders emerge from the anomaly that quickly grow into giant spiders which terrorise the population (especially young ladies of course). Scientists Dr Vance (Steve Brodie) and Dr Langer (Barbara Hale) need to find a way to save mankind.
This is ridiculous science-fiction horror trash of course but it is a lot of fun. Cheesy and makes little sense, but that is what films like this sound be like.
The film is oddly dated though as it feels like it should have been made about twenty years earlier when various kinds of space and mutated giant bugs were attacking mankind a few times a week.