Kurt Sniveller, being the bounder his is, can't stay quiet for long. The evil former wrestler is at it again, this time in the Andes Mountains of Peru, where he has discovered an ancient and elegant beast which may hold some of the secrets of mankind. In desperation, its keeper writes to Russell to ask for help in saving the mighty Badassaur from the dangerous clutches of Sniveller and the Sprite Squadron. The gang must rush off to Peru, where they will not only discover that Cap'n Nerv is also a free-style rapper but that there are secrets in Russell's past that the big man himself couldn't even begin to imagine...