Life before going to Hogwarts for 1st year

In this story 1st and 2nd year of the original book do not occur. The first year starts from the original 3rd book.
Harry spends a month before going to Hogwarts at St. Mungo's. Harry then standing to be sorted sees two people in the teachers' table. Two people he had been searching for years.
Let's see what happens next..............