Galwen, a young elf, was abandoned baby at the foot of the cottage of the Gallié family. Picked up and raised by the dwarves on the shore of Lake Knot, she leads a peaceful existence there until one day an elf reveals her past and her destiny. She is the sole heir to the throne of Tymelas, the hidden city of the White Elves. She must go there and save her people from the terrible Setroths, filthy creatures thirsty for power. This mission carries a lot of risks, but Galwen is ready to try the adventure, supported by the knight Oronoë. Then begins her perilous journey eastward.