In The Goblet of Fire, Harry has to participate in the Tri Wizard Cup where he goes through three different trials that you have to prepare for on your own. Some one had put Harry's name in the cup even though Harry is under age. This person that put the name in the cup had been secretly helping Harry out and trying to get Harry to the very end. Harry does get to the end, but there is a twist that is the hardest trial of them all. This isn't even a real trial as well. He's back and better than ever!