It was the Tri-Wizard Tournament, you were a "victim" of the game, you were underwater and Harry, Viktor, Cedric and Fleur had to save you, Ron, Hermione or Cho, you were Draco's sister and Harry's enemy.
Cedric had saved Cho, Viktor had saved Hermione and Fleur hadn't play, she gave up, Harry had eaten Gillyweed before entering the water, allowing him to swim more easily.
Harry finally arrives towards you, you were the last with Ron and the time was almost up and he sigh and unties the rope that was around your foot and takes you by the arm rapidly, he did the same with Ron and quickly brings you both to the surface of the lake..
The time had already passed and when Ron, you and Harry arrives at the surface of the lake and he looks at Ron and Ron gasp for air, and everyone cheer, but Harry looked at you.. He notices that.. you were not awake, not like the others, you were still unconscious.
Harry then looks at the other students and professors, Ron was still in the lake, and Harry was holding your body.
"SHE WON'T WAKE UP!"
Harry yell in panic, trying to shake your shoulder but you didn't show any signs, the students gasp and Dumbledore and other professors were shocked and worried too and Draco too, Draco was the most worried, you're his sister.