From Azkaban to Master

Voldemort returns.
Harry is wrongly accused.

All hell breaks loose... but it's already too late by the time the Order of the Phoenix realizes it.

Well some minor details very few know (harry being one) is Voldemort's appearance. No one would think You-Know-Who would actually come back looking like himself. No one really does think Voldemort is back at all...

Well until uncontrollable killings start to appear, disappearances rise once more and darkness swarms over every house, everyone shop, any place.
No one walks alone. No one stays out past dark. Children are not found without their parents. Some elder children even return home to make sure nothing back happens to there families.

And where's Harry during all of this?
No one knows. No one except the Order and Ministry know where Harry Potter lies.

One dangerous thing the Order and Ministry had failed to check... is if anything was left behind on Harry himself... well while he was still sane that is.