When a man with erythrosis suddenly recovers unusually fast after taking medicine, doubts arise about the incurable genetic condition. An elderly woman is amazed when a child who also has erythrosis saves her, sparking rumors he might be her great-grandson. DNA tests confirm the boy is indeed her long-lost heir, shocking everyone. Urgently, the man orders a city-wide search for the boy, who was last seen carrying a distinctive red sling bag. As the search begins, the boy’s exact whereabouts remain unknown, leaving everyone desperate to find him before it’s too late.