Join Harley, her robot dog Sprocket and best friend Cosmo for problem-solving adventures and mysteries in Inventia, a world where science rules and technology grows in the forest; and where exploding science projects, giant slugs and runaway robots are all part of a normal school day.

The Iron Forest near Harley's home is unlike any other - plants and trees grow cogs and hinges and other mechanical parts - and all of Inventia depends on it. So when a strange fungus is discovered, there's a race to find a solution. Without essential parts for inventions, the town is quickly falling apart...

But just who or what is behind the mysterious infestation? Harley decides it's up to her to save the day - with chaotic results!