The one adventure is coming says Harry in 2020,  wizards and witches had been fleeing London with their kids and Hogwarts was greatly affected. Harry Potter, Headmaster at the time was very shocked to see only 2/3  of the 100,100 students have been at Hogwarts in the last 2 years. He says It's a source from Storm Riders who have been destroying everything. Students have heard it too and started panicking So one day, Harry decided to close the school till further notice and make all students do work on Hogwarts is Here, An app that gives you a Hogwarts Expeirence.