and attractive step-mother Vickie, (Sue Casey) is returning home from an ill-concealed date, much the worse for the evenings activities. As she waves her date off and enters the house, she drunkenly looks for new fields to conquer and heads for Mark's room, when suddenly, in the darkened stairway, with a claw draped in seaweed, the monster attacks and kills the beautiful unfaithful wife.

Mark enters the house intent on finding something to prove his innocence. As he searches frantically, the monster appears and attacks, in their struggle, Mark pulls off the monster head, revealing Richards father and his horrendous masquerade. As Otto finishes off Mark, Richard and Jane enter the room unexpectedly and catch Otto in the very act of murder. f-fe races out of the house and as Richard and Jane bend over the dying Mark, the sheriff's police siren is heard outside. Now follows a hair-raising chase around break-neck curves in the Hollywood Hills, ending as Otto crashes through a guard-rail to die in a firey tomb, leaving Richard, Jane and the sheriff to watch helplessly.