What would you do, if you have a pet, no one should know about ('cause this pet actually doesn't exist ...) First of all: Protect! That's for sure! But it's not an easy task with a little creature like that, which is up to mischief every minute! Mappys is the name of the cutest challenge ever! Ten years old Charlie is up to a new adventure with her tiny batsquirrgaroo. Her brother Toby and her best friend Emily support her, as much as they can.