The Discovering of the Door

I've never written anything like this, so please see warnings inside.

The Novak family were a wealthy and well-loved family. Mr and Mrs Novak have four children, Michael, Lucifer, Gabriel and Anna. But, unbeknownst to the children, Mr and Mrs Novak have a very, very dark secret.

And sometimes, the Novak children could swear that they could hear noises coming from the basement.

But, when Gabriel invites his new friends over, Dean takes a wrong turn in the house and ends up in the basement, where he finds a locked door.

Behind that door, lies a dark secret that has been kept hidden for sixteen years.

But there is a question that people have long since forgotten; What ever happened to little Castiel Novak?