
Ethan Yeats, raising money for his mother's surgery, is betrayed by his girlfriend, Flora Leigh, and Caleb Cole. They steal the money and leave him beaten. He binds with the 'Disease Devouring System.' He cures Sebastian Sullivan and shames Dr. Felix Leigh. As he cures difficult cases, his system upgrades. Faced with threats from Flora, Ethan uses his power to fight back, reclaim his money, and seek revenge.