The show features live-action actors and puppet characters set in a colorful town called LazyTown. At the start of the series, the town's citizens are very lazy, but the mayor's niece (Stephanie) arrives to change that. She is aided by an athletic superhero named Sportacus, who teaches the children of the town to eat healthy food and exercise each day. However, their fun is often stopped by the town's laziest man, Robbie Rotten, who spends large amounts of time attempting to make the children lazy again and trying to remove Sportacus and Stephanie from the town, usually by dressing up in disguises to fool the children. Robbie's plans often fail. The show's episodes often involve an educational or important message for viewers, and songs or dance numbers performed by the characters, usually Stephanie being the lead singer or dancer.