Amos Daragon, the young successor of the mask bearers, leaves Upsgran to accompany the Beorites on the island of Freyja in order to beg the fertility goddess to break the curse that prevents them from seeing their children grow up. Unable to leave in the village the egg stolen from the dragon of the mountain of Ramusberget, they hide the dangerous offspring on the drakkar and set sail for the end of the world. But Baya Gaya, a bloodthirsty witch eager for fresh children's flesh, receives from Loki, god of fire and discord, the mandate to eliminate the two young warriors who are preparing to reconcile Odin and Freyja. At the same time, Sartignan is taken prisoner of the Bonnets-Rouges while attempting to free Amos' mother. Lolya, in a dream, warns them.