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.

When Festro's nephews pay a visit to the fort, they turn out to be complete wimps, so the gang teaches them how to be "rude crude dudes with attitude", but their efforts go too far.

Every time the Disgustoids have a party, Slog turns into "Party Slog" which annoys the bros, but when trouble strikes they need him to do so.

When Dingle abandons his friends they try to get him to come home.

Gweelok is excited to meet his science idol, but grows more and more frustrated when he starts taking an interest in Festro.

While travelling to Dingle's family reunion, numerous setbacks keep Dingle and The Fart from making it, until The Fart realizes that Dingle is sabotaging their trip.

When a werebaby bites all of the Disgustoids but Slog, they start turning cute, so Slog must find a way to cure their affliction and make them disgusting again.