Dumbledore needed new professors for his new class... Defence against the supernatural.
Something weird is happening in Ikebukuro, and Izaya and Shizuo become victim to it.
When Sam and Dean get a case in a new town, they head over. But they find one of their old friends are terrorising the town.
When Sam, Dean and Castiel go on a hunt in New York, they run into Ultra. Sam has recently been walking in his sleep (or is it walking?) he can also read people's minds. Dean and Castiel are trying to find out what is happening to him.
When Ultra capture Castiel and bring him to HQ, how will Jedikiah react?