If you could change the past, even if it meant erasing your future, would you?
Hermione has thought about the veil in the Department of Mysteries ever since Sirius fell into it. With the war won, and Voldemort defeated, she should be happy. But too much has happened, so much pain, too much loss.
Armed with as much knowledge as possible, she goes back to the veil, hoping to bring Sirius back. After everything he has been through, Harry deserves a little light back.
But what Hermione doesn't know is the veil is holding many secrets, and instead of bringing Sirius back, she is thrust back to his time. Suddenly surrounded by the happy faces of alive Marauders, she must make the difficult decision. Let the future play out as it should, or change it, and perhaps save a few lives along the way.