Mouse is desperate to be a superhero. To find that power that will make him stand out in the crowd. But his every attempt ends in failure.

He can't even get any attention at home as his five brothers (triplets AND twins) take every second of mum and dad's attention. When mum foils a bank robbery while on duty as a lollipop lady, she and Mouse are lauded as superheroes. Joining forces with Mouse are The Z List - a group of unlikely crime-fighters.

But in their midst is a traitor hell-bent on revenge. Will Mouse be super enough to spot this danger, and is he brave enough to do anything about it?