Under the Whomping Willow SYOC (CLOSED)

Centuries after the fall of He Who Shall Not Be Named, Hogwarts was once again peaceful, bringing forth new students in its majestic halls. Little do they know that chaos will soon enter and spread all over the peace they thought was true. What could have caused this turn of events? How come nobody suspected a child of such atrocities? It all comes back to one single date.