Frost was flying around untill he saw a egg on the egg the egg was you.. You was the unborn baby dragon you didnt hatch yet

THE NEXT DAY

he took you home to his cave to show his friend Kaiza The half white dragon

the next hour

kaiza spoke up to frostbite

"When hes gonna hatch? I dont think his family is live anymore.."

frostbite felt guilty for me having no family

"Probs hes lost.. And the humans took him away.. And dropped him.."

while the humans named hiccup was in his house working on somthing

Next day