The Trials of Little Pierrette

How will you feel if you are only twelve years old and you are left with no money and no family in the vast and unknown Paris? You can rely only on yourself and on the donkey Polycarp. But what can it help you, except to caress you with your soft face? Your only chance is to find your rich grandfather. But he lives away from Paris and hasn't even been I've heard of you.
All this must be dealt with, little Piereta!
Will she be lost amongst the dangers that lurk from everywhere? Will she be able to overcome all the trials and find her happiness?