Indy and Olivia are crazy about making slime, but they run into trouble when a big toy factory boss starts an anti-slime campaign to increase his own toy sales.

Julia, Nick and Sterre start their school year with success: they have a contract with a record label and are allowed to perform in a major national live show. But then their school merges with another, so that everyone from the rivalling Olympus College joins them, including their eternal rival Babette! All squads are turned upside down and while Babette tries to regain her number 1 position, the Misfits befriend the shy Tara. The Misfits must do everything they can to stay together and follow their dream of winning the final of the international music competition, the TMAs.

Slime creator Indy has to come up with a super cool new slime recipe for a big Slime Gala. When she secretly adds octopus slime while making it, magical colors are created. This is the best slime she's ever made! But when jealous slime creator Benji steals the recipe, everything goes wrong. Can Indy stop Benji and win back her slime fans?