Behind every great superhero is a very angry younger brother.

Luke Parker was just your average comic book fan until his boring, teacher's pet, helps-old-ladies-across-the-street brother Zack got turned into a superhero. Luke can't believe the unfairness of it all--he's the one with the encyclopedic knowledge of everything from Ant-Man to Wolverine! At least he can help Zack--aka Star Guy--with all the important parts of becoming a superhero, like using his newfound powers and deciding whether or not to wear a cape.

But when Star Guy gets into super-size trouble, it's up to Luke--and his intrepid neighbor, Lara--to rescue his big brother and, with a little luck, help him save the world.