They have come face to face with a lethal troll and only just managed to escape a horrid sea monster. Now, once again, it is time for twins Nova and Simon at the Helper Agency to come to the rescue.
It all starts with a visit from a mysterious, little metal bird. The bird belongs to Sessa the Elf, who has been captured by evil creatures deep inside a mountain. Sessa had been there to pick the rare, magic fire berries that she needed in order to cure the elf princess of her frost fever.
The twins manage to get inside the mountain, are sadly found out and chased, but eventually reach the spot where a few measly, shrivelled fire berries are growing on a bush.