A troll wakes up in the "forest of beginning" of a fantasy world with only faint memories of his past human life and unable to speak. The human realm will spare no expense to bring down this monstruous threat. While clinging to his humanity, the troll must use his cunning and modern knowledge to survive and evade the hunters.

It is a dark age in a world of swords and magic, ruled by superstition and iron-clad rules. Tradition and conformity are the absolute cornerstones of society. There is no calendar, people count time by seasons, or days. Death, famine and vicious monsters are everywhere. People clutch in their communities, afraid of what is outside. Here and there, a Hero rises, his tale brief like a shooting star.

Powerful monsters that drift too close to human's realm must be eradicated at any cost, or society might crumble. The Troll comitted this sin.