A class of astronomy students and their fearless teacher, Dr Serling, get more than they bargained for on their latest field trip when they witness an alien spaceship crash-landing in the English countryside.

Investigating the wreckage, the students and Dr Serling find a furry little alien called Mumpy. Their excitement at this close encounter soon turns to horror when they learn that Mumpy is being targeted for extermination by a group of bloodthirsty creatures from outer-space.

Cut off by the advancing army of creatures and with all communications blocked, the students, Serling and Mumpy find refuge in the country home of a retired army major. Gathering together the major's collection of antique weapons, our heroes make a stand against the alien monsters.

Outnumbered, outgunned, and running out of ammo, can our heroes survive the night? Or will they be the main course at the creatures' bloody banquet?