The main character is Stephanie (Julianna Rose Mauriello), who arrives in town and urges her new friends Ziggy, Trixie, Stingy, and Pixel to go outside and be active, instead of staying inside and playing video games all day. Her uncle, the bumbling Mayor Milford Meanswell, enlists the help of Sportacus 10 (Magnús Scheving), a self-described "slightly-above-average hero". It is Sportacus' job to inspire the kids to play outside, and to help solve low-key emergencies that occur from time to time. However, all this does not sit well with Robbie Rotten (Stefán Karl Stefánsson), a lazy man who lives in an underground lair hidden just on the edge of town. Most of the episodes involve Robbie Rotten dressing up in one of his numerous costumes and trying to make Sportacus and Stephanie leave town forever so he can encourage the kids to be lazy again.