Empire of Ash (1988)
In a post-apocalyptic future, cities have been destroyed so the
survivors roam the remaining forests. An aggressive, traveling gang of
"maniac warriors", named LARD, which stands for, what else, Leukocytes
Acquisitors for Remission of Disease, go around terrorizing and killing
people. Who they don't kill, they kidnap and steal their blood so they
can continue to survive. Naturally they are led by an insane,
shroud-wearing preacher, and when they kidnap the wrong girl, her sister
and a defector from LARD who is now a good guy team up to try and
rescue her.
This film was re-released as Empire of Ash 2.