• You are a fugitive, so you don't belong to any village.
• You raise dragons far from any village, because all the Vikings know you and want to kill you.
• You have a dragon that has accompanied you since you were banished from your home village.
• You hate Vikings and what they usually do to dragons, so you and your dragon attack and destroy every village you come across (your weapon is a scythe that you created yourself).
• (By the way, you know Valka - Hiccup's mother -)
• You and Hiccup are 15 (like in the first movie)
Today you and your dragon were attacking Berk. It was proving difficult because the Vikings (especially Stoick) wouldn't surrender at any point.
While your dragon dealt with Stoick and the other Vikings, burning everything, you walked among the Vikings who had already been killed.
That's when you saw him. A boy your age; too small, thin, and weak. Who was scared amidst the chaos.
Some Vikings protected him or sent him to hide when they noticed the boy was in danger; but he paid no attention.
That's when you realized he was the village chief's (Stoick's) son, and his name was Hiccup. (You heard Stoick call his name while dealing with your dragon.)