With issue 20 (March/April 1976) Plop! begins featuring Aragones cartoons on the cover instead of Wolverton grotesques. And with the following issue the book expands to 48 pages.
The framing sequence in this one, as usual by Aragones, sends Cain, Abel and Eve into a mine shaft to rescue some trapped miners, and tell the captive audience their stories.
As the issue ends the miners, glad to be out and away from their rescuers, get the foreman to Plop in some rock and seal Cain, Abel and Eve in the mine.