Dumbledore suspects Voldemort will make use of the Triwizard Tournament to get his hands on Harry Potter. So he seeks help from the Big Three demigods to protect Harry. Percy, Thalia, and Nico have to go to Hogwarts to protect Harry, undercover of a fourth participating school. But as suspicions rise, and Voldemort finds out about the demigods, will they get out of this alive?

The Big Three demigods have to travel to Hogwarts and befriend the wizards, repair the old conflict between demigods and wizards, earn their trust, and stand together to fight the big battle with Lord Voldemort. Are the demigods capable of that? Because if not, the wizards will lose the war without the help of the demigods. All is at stake. Post Giant War and battle of Hogwarts.