At the summit of the highest mountains on Earth lives a plant that radiates eternal light: the Himalayan flower. Yuku goes in search of it to give it to her grandmother, who has announced that she will soon follow the blind mole into the depths of the earth. Yuku has a long journey ahead, strewn with obstacles— including the rats that live under the castle, the meadow of voracious crows, an enchanted forest where it is easy to get lost—and, worst of all, the bridge of fear that is guarded by the wolf! With her ukulele and her songs, Yuku will make many new friends who will be precious to her as she embarks on the adventure of life.