The Disgustoids disguise themselves as cops so they can walk on the surface, but whilst The Fart wants to follow the duties of a cop, all Festro, Gweelok, Dingle, and Slog want to do is pump up the jams.

The Disgustoids are delighted when Secret Mountain Fort Awesome comes to life and starts wrecking havok on the surface world, but when Fort falls in love with another mountain, Festro tries to break up the relationship, but ends up having to repair his broken heart.

After giving all the gang's money to a deposed prince from Nawibawabi, Gweelok needs to find money to pay the fort rent. The Disgustoids try to find a new roommate, but it turns out that she is the prince from Nawibawabi.