Siblings Gretel and Kevin are to be bestowed super powers by space aliens on their birthdays, but after Kevin's powers accidentally go into Hamster, his pet hamster instead, they form the duo of "Hamster & Gretel". Now Kevin must figure out how to work with both Gretel and Hamster to protect their city from mysterious dangers.
Kevin and his sister Gretel and her superpowered hamster return to protect their city with their newly granted superpowers by aliens. After protecting their city from local villains in the first season, their adventures take a dramatic turn in a new season of Hamster & Gretel. This time, they will face a global extraterrestrial threat while juggling school, crushes, and local villains.