In a post-apocalyptic world plunged into darkness, humanity’s survivors bear glowing scars that reflect their inner struggles and strengths. Kaito, a young warrior, discovers he holds a fragment of the mythical “Heart of Light,” capable of restoring the lost sun. Battling his own doubts and the dangers of the ruined world, Kaito’s scars shine brighter with every act of courage. As he reaches the final city, he must decide: use the light to heal himself or reignite the world for everyone.