King Stern rules over a dark empire of hares. His brother Atta leaves. Before his love Hulde gives birth to their first child, he wants to find a field of his own, bathing in light. Every day Hulde runs to the frontier, where she stands on the lookout for Atta. But then the baby arrives, too soon.

At a rapid pace, Princess Ebba grows into a smart child. Hulde notices that this curious girl resembles Atta more and more – and that is not a gift. When they discover an abandoned bird's nest in a rabbit cave, Ebba wants to go on a trip just like her father. But, is she as brave as him?