Ben, Gwen, and Kevin follow a lead that takes them to a secret base in the desert. There they hope to find Grandpa Max but instead find a Highbreed spaceship with a giant cannon.

A signal from Kevin's Plumber badge leads Ben's team to a cornfield where local police pursue a Pyronite-human hybrid they blame for crop circles and recent area fires.

While making repairs to the Rustbucket, Kevin steals it. He plans to use it as collateral for some other technology, but it gets stolen from him. Ben and Gwen go after Kevin.