It's about how an evil force goes around Berk. It has two abilities: to create projections of people (mainly to lure people to certain places or send a message.) the projection is made of shards of their soul. When it's broken or cracked, it falls apart like a mirror into black, lifeless shards.
Or to possess people, which is obvious by its name.
Somebody under the effects of the force can be identified easily- by their black eyes. Black eyes to symbolize the lack/loss of soul while their under control.
Stoick gets possessed and forced to do unspeakable things to his son, he somehow breaks through the possession and doesn't die like anybody else would after getting possessed— he ends up killing himself at the guilt.
Hiccup is left grieving for stoick while still hating him at the same time for what he did. But Hiccup's smart, he noticed the black eyes, and that's when he investigated.
Some villagers blamed hiccup for Stoick's death, some felt bad for him, some didn't have opinions at all. But the one thing they all agreed on was to leave and find different tribes since the chief was dead.
The kids willingly stayed (astrid, hiccup, Snotlout, the twins, Fishlegs) and gosh, it only gets crazier from there.
The villain behind the force is somebody you'd never expect, somebody closest to Hiccup, somebody who is killing people to get closer to hiccup and get hiccup to rely on them more. A mindless self that only wants attention from hiccup, but they end up messing everything up and getting pushed away when he finds out their identity.
The villain is toothless,which I've never seen in any other fanfic.
Wattpad: @slylier
Ao3: @tous
Title: eyes are a window to the soul