The Riddle House

The Riddle House is the first chapter of Harry Potter and the Goblet of Fire.

Summary
At an old condemned home, known to locals as the "Riddle house," Regulus Black and Albus Dumbledore look around the decrepit building, searching for a horcrux. The wizards search but find no trace of a horcrux and Regulus goes back to his hidaway, at Grimmauld Place, where he has been living in secret with Sirius for some time. He finds Sirius waiting for him, reminding that he's going away for a few days to the Quidditch World Cup, and checking to see if Regulus is prepared for his extended absence.

Deviation from Canon

 * The entire chapter was told through the view of Frank Bryce, the Muggle gardener of the Riddle House
 * Voldemort and his servant are at the Riddle House during the events of the chapter, and no one, other than Frank Bryce, is there investigating it
 * Frank gets killed when he is caught eavesdropping on Voldemort and his servant.
 * This chapter makes references to things not revealed until later books in canon:
 * The first mention of Horcrux, which was not revealed in canon until Harry Potter and the Half Blood Prince.
 * It's also stated that Regulus went after a Horcrux and would've died, had the House Elf Kreacher not saved him. In canon, Kreacher did not save him and he drowned.