Even though Torak and his friends carefully guard the fire opal, Tiazzi still manages to steal it. Upon learning of this, Torak, Renn, Wolf and the leader of the Crow tribe, Fin-Kedinn, rush in pursuit of the Eater of Souls. Their path lies in the Heart of the Forest, where mysterious trees grow, where animals unknown to them live, where their own laws and customs reign. Getting to the Soul Eater turns out to be difficult: cunning traps set by Tiazzi are everywhere, evil and disunited tribes are ready to deal with anyone who invades their part of the Forest. But the most dangerous enemy is fire, which devours everything in its path with incredible speed...