Ailan and Marill are sent to Keola by Dedalus’s dislocator, to find the key that opens the starry Prism, but they find themselves at open sea, in the middle of a raging storm. They will be saved by a strange winged boat, that will take them to Vjnlan, the Archipelago of Wind. Here they will have to break out from a prison overlooking the sea, fight ancient sea monsters, grumpy and unpredictable shamans and wars between enemy populations.
During their missions the kids will bring to light the deceit that the Udara, proud people of the air, has staged for a long time in order to gain the submission of the Ikan, people of the sea. Thanks to Ailan’s and Marill’s intervention, the Ikan will find the courage to rebel against the Udara and will face them in an epic battle, helped by the giant winged Kurcan.