Very little time has passed since classmates Adam, Tara and Tobias became the keepers of the key to the gates to Helheim and swore to the troll Kark to protect their town and the whole world from the Evil lurking underground. But the friends are once again faced with a difficult challenge that will test not only their courage and strength, but also their friendship. Mysterious wolf tracks in the woods, the disappearance of a schoolteacher and the appearance of a new, strange classmate — all this looks quite unusual, but the guys do not even suspect how ominous these changes are. Helheim is not sleeping! Loki has already come up with a new plan for revenge and capturing the keys!An exciting fantasy thriller from the star duo Arne Lindman and Ida Shelbakken for anyone interested in Scandinavian mythology!