A woman/girl (age indeterminate—looks to be about 20) named Barbie Bannister is riding a yacht with her parents near Man-Thing’s swamp. Why are they in a yacht by a swamp? I don’t know. But there’s an implied gang rape when the boat is hijacked and her parents are killed. She manages to jump off the boat and make her way to the swamp. Man-Thing finds her and kills her assailants.
This is pretty brutal stuff.