Sirius, Harry, Ron, The Weasleys and Hermione were in Grimmauld place, at the table in the kitchen, eating, until Harry came in the kitchen to say something to his godfather Sirius,

"There's someone knocking on the door."

Harry said and Sirius didn't like that, Ron was beside Harry.

"Yeah it's a boy, he's looking for you, Sirius."

Ron said while Sirius eat, The Weasleys eat and Remus too.

"Who are they?"

Hermione asked and Sirius sigh and looked at the three.

"Whatever he do, don't open that door."

They hear your voice outside the door, you were Sirius' son send in Azkaban because you were crazy, you were sent when you were 7 years old and now you're 17 years old.. 10 years you were in Azkaban, you're finally free.

"Open the door."

You said as you bang on the door but nobody move and Sirius, didn't recognize your voice because you grew up, so nobody recognize your voice they though it was some crazy, psychopath behind that door.