A reoccurring nightmare afflicted Khan's nights since the Second Impact. His dreams replayed the scenes of the crash of the Nak's spaceship, an alien race that the humans had defeated five hundred years ago. Khan's life had turned upside-down after the tragedy. His mother had died during the incident, and the Nak's toxic mana had infected him. His father had managed to save him, but they ended up losing their home and name in the process. The nightmares wouldn't let Khan forget about the Nak, so he set his mind to join the Global Army and learn to wield mana. He had to put an end to those dreams, even if that meant hunting down that alien race through the stars.
In a world where humanity lives in suspended space, children undergo a fishing test when they come of age. Those with immaculate talents have the possibility of becoming great fishing masters. In the endless sea, every life is imbued with a sacred mission. There are fish that can fly, turtles that have absorbed the worldly essence, and whales that can devour the heaven and earth… There are also countless fishers. Fishing is an art. There is an ancient saying: If you can’t fish, you might as well be bait.