Two years after the story "Fafner Exodus", an empath boy Maris betrays Alvis and takes young Soushi to Festum's place. A new battle begins to get him back.
Three years passed since Soushi taken. He grew up with his fake family in a peaceful island that looked exactly like Tatsumiya island. Now he wants to know about the world.
Venon has trapped Rina's psyche and obtains information about Alvis from her. Soushi starts to live with friends, gains mentors, and learns how to live his circumstances.