It was the Tri-Wizard Tournament, you were a "victim" of the game, you were underwater and Ron, Viktor, Cedric and Fleur had to save you, Harry, Hermione or Cho Chang, you were Hermione Granger's sister.
Cedric had saved Cho Chang, Viktor had saved Hermione and Fleur had therefore saved Harry, Ron had eaten Gillyweed before entering the water, allowing him to swim more easily.
Ron finally arrives towards you, you were my last and the time was almost up and unties the rope that was around your foot and takes you by the arm rapidly and quickly brings you to the surface of the lake..
The time had already passed and when Ron arrives at the surface of the lake and he looks at you.. He notices that.. you were not awake, not like the others, you were still unconscious.
Ron then looks at the other students and professors, Ron was still in the lake, holding your body.
"SHE DIDN'T WOKE UP!"
Ron yell in panic, trying to shake your shoulder but you didn't show any signs, the students gasp and Dumbledore was shocked and worried too and Hermione too.