The Floo Powder Accident

Harry Potter and his friends are going somewhere but are taken to the wrong place: Panem. They meet Katniss and Peeta Mellark. Will they help them out? How will they get back? How did they get there? What time will they land in if they return? Summary to where they are in the series of both stories. I'm bad at summaries but my writing is better! Rated T for violence.