Main plot 1: The young doctor struggles with his debilitating disease while striving to prove himself in the competitive medical world. This sets the emotional and professional foundation.Main plot 2: The doctor unexpectedly acquires supernatural darkness powers, which become a unique tool for healing and battling life-threatening emergencies.Main plot 3: The emergence of a world calamity forces the doctor to use his powers beyond medicine to protect and save humanity.Main plot 4: Alongside his medical and supernatural battles, the doctor discovers unexpected love, which challenges and supports him through personal growth and healing.