Spirits in my head

"I wish I'd never sleep"

What would you do if you get the same nightmare every night you sleep?
17 year old lily can't sleep at night or in the dark, because a nightmare is always waiting for her to sleep. But her nightmares are related to an incident,which her parents (Mr and Mrs Steve) are hiding from her.
Is she possessed? Or some paranormal powers are torturing her? Or is she just having normal nightmares? These questions never leaves her mind in peace.

Lily also had a little brother Niall, who she loves the most, and always tries to keep him safe, even if had to distinct herself from her precious little brother.
In her childhood lily and Niall found a secret basement of their father ,which has always been a mystery for them. What must be inside? They were always curious as they were not allowed to be near it.
Mr and. Mrs Steve had always been busy to protect lily, but she never knew why.
One day Mr Steve told lily about the night it all started. What happened that day?

After knowing the narrative, things got clear in her mind, but now she was getting to close to a disaster. Did Mr Steve successfully protected his doughter or did he failed to?