Stephanie throws a thank-you party for Sportacus, and she wants her friends to be on their best behavior. But Robbie appears as manners-expert "Miss Roberta” and teaches the kids to misbehave even more.
The LazyTowners give Sportacus the day off, but he just can't get used to relaxing. Robbie Rotten creates a vicious dog robot who chases everyone – including Robbie! It's up to "Sportastephanie" to stop Robbie's robot dog.
Robbie wins the election for Mayor by cheating and makes up new rules for LazyTown that encourage laziness. Mayor Meanswell becomes a spy and--together with Sportacus and the kids--try to foil Robbie's plan.