
Goofball American youths Jack and David (Griffin Dunne & David Naughton) are backpacking in England when they are attacked by a werewolf, leaving Jack dead and David barely injured, but infected with lycanthropy that takes hold of him every full moon.
After a stay in a hospital whilst having his wounds treated, David is taken to the flat of a pretty nurse (Jenny Agutter) who has taken a shine to him (if this is starting to sound a little like a "Playboy" pubescent fantasy, read on.)