Entrails of a Beautiful Woman (1986)
A woman doctor is savagely attacked by members of an evil Japanese Yakuza Cult. After being raped and injected with a drug called Angel Rain the doctor commits suicide. Soon after the doctors untimely death a young psychologist infiltrates the gang to avenge the doctors death. When the gang learns of her deception she is brutally killed. Her death brings a savage payback to everyone involved in her death.