"Dark Mortal" follows the tragic life of Nam Kang, a boy who lost his parents in a horrific explosion and was left with severe facial scarring and blindness in one eye. Labeled a "freak" and mercilessly bullied throughout his school years, Nam's only solace is "Inky," a mysterious, amorphous black blob that only he can see. When a particularly violent bullying incident pushes Nam to the brink of death, his bond with Inky undergoes a terrifying transformation. Nam wakes up to find his scars healed, his sight returned, and his body imbued with superhuman strength—but Inky has vanished, now residing inside him. As Nam navigates his new power, he discovers the existence of other "Dark Mortals" and a dark conspiracy involving the orphanage of his past, forcing him to choose between revenge and humanity.