Thanks to an unfortunately tasty-looking radioactive garden slug, eleven-year-old Murdo McLeod is now the world's worst superhero. His two powers are pretty unique: the first is sliding up walls. Quite slowly. The second is secreting slippery slime from his skin. (Yes, just as disgusting as it sounds.) In a Scotland full of awesome superheroes, Slugboy has a lot to prove. No one wants help fighting bad guys from someone with a horrible habit of (quite literally) messing things up. He's so underrated, in fact, that when an evil mastermind devises a plan to capture all the other superheroes, Slugboy isn't even on his list. Now, Slugboy has to use his not-so-super and oh-so-gross abilities to free the other superheroes and save the world. Let's hope he doesn't slip up.