When Castor snapped, Selena thought all was lost. Nevertheless, she is determined now more than ever to change the fate of the universe, no matter the cost. On the contrary, Altan and his parents are thirsty for revenge. The sun descendants have their own side of the story, too, but is all the way it seems? With the galaxy on the brink of destruction and a brutal war looming, Selena and Castor must fight back with a bit of hope and plenty of courage. Now there is only one thing left uncertain: who will be victorious?