During Harry`s fourth year of school, detailed in Harry Potter and the Goblet of Fire, Harry unwillingly participates in the Triwizard Tournament, a dangerous magical contest with the young foreign witches and wizards of visiting schools. Harry attempts to discover who has forced him to compete in the tournament, and why. An anxious Harry is guided through the tournament by Professor Alastor Moody, a new teacher who turns out to be an impostor—one of Voldemort`s supporters in disguise. The whole thing eventually turns out to be a conspiracy to kidnap Harry and bring Voldemort back to power. The point at which the mystery is unravelled marks the series` shift from foreboding and uncertainty into open conflict as the children are growing up. The novel ends with Voldemort`s resurgence and the death of Cedric Diggory, one of Harry`s fellow student competitors in the tournament.