Discover your inner superhero in the further adventures of the intrepid SUPERQUESTERS! When Leo’s mum challenges Leo, Lilli and Bea to figure out how to power a model airplane using a special biofuel that can be made from an ingredient in their very own garden, the friends start investigating and return to Questland in search of a solution. They discover that the evil Lord Grumble is up to his dastardly tricks, stealing energy throughout Questland from the sun, wind, water, animals and crops, and sending it back to his secret hideout on Black Rock Island. Adventure and excitement await as the friends work together to crack this latest case. Can you help them defeat evil Lord Grumble and return the stolen energy to Questland?