During a bottle Harry and Rose Potter were transported to an alternative universe where their parents are alive but unknown to the Wizarding world not only the twins but the elemental world and its war had come to their world too..my first fic I'm still learning

Harry and Rose Potter travel to another world in which they are dead and their parents are alive but that's not all not only them but their worlds muggle world had come to The parallel world too with all of their friends and enemies many of them unknown to the Wizarding world hiding in the shadows and ready to attack... I am awful in summing up my first fic so I'm still learning...