Yes, it was a story that just happened in a certain yeshiva.
A few monthes ago, a young yeshiva boy( lets call him Chaim) fell into a coma and was diagnosed with Meningities. Nissim lead to his well being today. He BH walks the streets as if nothing happened.
The night before his collapse, a well known and respected Rebbe came to the dream of his roomate(lets call him Sholom) and told him to get rid of the sheidim in the Bais Medrosh of the yeshiva. The dream continues when Sholom asks Chaim to come down with him to help as he is scared to go alone.
The two boys go down and as they appraoch the Aron, Sholom notices how the sheidim are attacking Chaim to the point where he ends up on the floor. That minute, Sholom awoke from his dream in a sweat and realized that after such an experience, he must go to the Mikveh.
As Sholom left the building to go, he noticed how Chaim was taken into an ambulance on a stretcher. He turned white like a ghost and brought the story to the Hanholoh.
BH, Chaim was Zoicheh to a full recovery. When he was released from the hospital, Sholom told him about the dream and mentioned the name of the specific Rebbe who warned him.
Chaim went to see that Rebbe and he indeed confirmed that THIS particular Yeshiva is not for him. He told him it was best for him to choose another Mokom Torah.
Chaim took the Rebbes advice and the impact was phenomenal.
When Chaim went inot his room to pack, he fainted!