Harry didn't do what everyone expected of him and he became a professional Quidditch player, however, he still has a huge hero streak. When he does something reckless to save Draco Malfoy from a potentially fatal fall in a match it changes more than just Draco's attitude towards him.

Voldemort has captured Harry and for his own twisted reasons has chosen not to kill him outright. Revenge in the Dark Lord's mind requires a fate worse than death and Harry is about to find out what that is.