He's a total menace to his teachers and big sister, but has a

soft side, too: he rescued his dog, Monster, from being run over

and checks on his elderly neighbour after school.

One day, while looking through a mysterious cabinet of curiosities,

Maxwell finds himself erased from his life:

it's as if he's never been born.

At first, being able to walk around without being yelled at is

great, but Maxwell starts to miss his old life.

And, if he'd never existed, then he wouldn't have swooped Monster

out of the path of that car...