As the professors of Hogwarts school approached the Hogsmeade pub for their monthly drink, Dumbledore heard a strange sound. It sounded like loud shrieks, but whether they were of pain or pleasure he didn't know. He left the other teachers as they walked into the Hogs Head and strode up the path towards the sound. The other teachers didn't notice and just walked in.
Albus walked all the way up the hill between the small houses and shops, curious about the sound. As he got to the top of the hill, the reality of it set in. Walking closer to the barbed wire fence, he heard cries and screams.
The sound was coming from the Shrieking Shack.
The news of the return of the screaming from the shack travelled around the town and Hogwarts school like wildfire. Everyone thought that the evil spirits of the past had returned.
But only two students knew the truth. Those students were Ron Weasley and Hermione Granger.