The experience of being a caveman living in the 21st Century has been a lot of fun for Ug Lug, even though the same may not be said for those around him. He's enjoyed television and destroying most of the city looking for employment, butnow he wants something else. Ug wants to be a costumed hero like the ones he's seen on TV. It's a good thing too because the world is going to need heroes when Dr. Madbad and his new evil friend, Bastian Wolfe, open up a time portal that allows dinosaurs to run rampant on Washington D.C.! Worse yet, the monstrous radioactive Rad stands in the way of Ug saving the world. Thankfully, Ug has a lot of heroic friends like Claw the Kung Fu Ninja Cat, Metal Mutt, and Johnny Rebel, but will they be enough to stop the bad guys and save the day