Nobody knows exactly who the Night Stalker is. Some say he is an ancestor of an old race, when the world was ruled by the creatures of darkness. On the dawn of the First Day, all the darkness creatures perished but one. He took the role of the Boogeyman, scaring children in their sleep and terrifying them.
From that moment, the Night Stalker became the nightmare of the defenseless and powerless, showing that our worst nightmares are actually true.