Disclaimer: I Do Not Own Harry Potter.
This plot is up for adoption, all I ask whoever adopts it send me a PM so I can read the story.
Plot 10
A year after Voldemort died a group of unknown Death Eaters set of a weapon he'd created to punish the wizarding world if he lost.
From Sunrise to Sunset the outside air is toxic, sunset to sunrise monsters lurk waiting in the breathable night air to attack anyone who is unlucky enough to cross their path. People say the monsters were unlucky enough to survive the toxic daytime air and became monsters.
Unable to flee to the untouched Muggle world for reasons unknown, Witches and Wizards spend their days praying that the outside air won't get through houses and their nights hoping that monsters attack anyone, but them.