The mystery Beyond the Peak

Once upon a time there was a grandpa and Grandma and they died at childhood and the story ends the mystery is when Grandma and grandpa go to childhood and died ???...

SHREYAS BHANDAREMy name is Shreyas Bhandare I am studying in 8th class I am so creative and I love to read many books of mystery that's why I wrote about the book The mystery beyond the Peak