Parallels Could Meet

We all sometimes In our life must heard about parallel universe which literal meaning is A reality or world that exists simultaneously with ours, but independent of it.
But we never believed something like this to actually exist same like our 5 friends - Noah , Tracy , Jaelyn , Shane and Brad .
But a plane flight clear their doubts when they meet a mysterious person on their way to Europe.
This book deceipts about their horrible trip which they would never forget and their struggles in finding their own self.