Change (HTTYD fanfic)

Had already passed since the week the battle of the Red Death and Hiccup still have not woken up, which begins concern to all...

But what happens when he finds himself in the future?

"How would you feel if you knew what would happen in the future, and you would be able to change it?"

Can Hiccup will be able to change the tragic events?

And what happens when he wakes up to reality?