Steve and Snot are fed up with being bullied. When they enroll in a karate class, Snot is brainwashed by the sensei and its Steve's mission to get him back. Meanwhile, Klaus develops a horrible odor and is forced into being an outside pet.

When Francine's sister Gwen comes to town, Hayley suspects she is up to no good. Meanwhile, Stan teaches Steve the art of hugging Aunt Gwen and Klaus shadows Roger's dramatic comments.